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 #define CERT_CHAIN_PARA_HAS_EXTRA_FIELDS
  24 #define CERT_REVOCATION_PARA_HAS_EXTRA_FIELDS
  25 #include "wincrypt.h"
  26 #include "wine/debug.h"
  27 #include "wine/unicode.h"
  28 #include "crypt32_private.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(crypt);
  31 WINE_DECLARE_DEBUG_CHANNEL(chain);
  32
  33 #define DEFAULT_CYCLE_MODULUS 7
  34
  35 static HCERTCHAINENGINE CRYPT_defaultChainEngine;
  36
  37 /* This represents a subset of a certificate chain engine:  it doesn't include
  38  * the "hOther" store described by MSDN, because I'm not sure how that's used.
  39  * It also doesn't include the "hTrust" store, because I don't yet implement
  40  * CTLs or complex certificate chains.
  41  */
  42 typedef struct _CertificateChainEngine
  43 {
  44     LONG       ref;
  45     HCERTSTORE hRoot;
  46     HCERTSTORE hWorld;
  47     DWORD      dwFlags;
  48     DWORD      dwUrlRetrievalTimeout;
  49     DWORD      MaximumCachedCertificates;
  50     DWORD      CycleDetectionModulus;
  51 } CertificateChainEngine, *PCertificateChainEngine;
  52
  53 static inline void CRYPT_AddStoresToCollection(HCERTSTORE collection,
  54  DWORD cStores, HCERTSTORE *stores)
  55 {
  56     DWORD i;
  57
  58     for (i = 0; i < cStores; i++)
  59         CertAddStoreToCollection(collection, stores[i], 0, 0);
  60 }
  61
  62 static inline void CRYPT_CloseStores(DWORD cStores, HCERTSTORE *stores)
  63 {
  64     DWORD i;
  65
  66     for (i = 0; i < cStores; i++)
  67         CertCloseStore(stores[i], 0);
  68 }
  69
  70 static const WCHAR rootW[] = { 'R','o','o','t',0 };
  71
  72 /* Finds cert in store by comparing the cert's hashes. */
  73 static PCCERT_CONTEXT CRYPT_FindCertInStore(HCERTSTORE store,
  74  PCCERT_CONTEXT cert)
  75 {
  76     PCCERT_CONTEXT matching = NULL;
  77     BYTE hash[20];
  78     DWORD size = sizeof(hash);
  79
  80     if (CertGetCertificateContextProperty(cert, CERT_HASH_PROP_ID, hash, &size))
  81     {
  82         CRYPT_HASH_BLOB blob = { sizeof(hash), hash };
  83
  84         matching = CertFindCertificateInStore(store, cert->dwCertEncodingType,
  85          0, CERT_FIND_SHA1_HASH, &blob, NULL);
  86     }
  87     return matching;
  88 }
  89
  90 static BOOL CRYPT_CheckRestrictedRoot(HCERTSTORE store)
  91 {
  92     BOOL ret = TRUE;
  93
  94     if (store)
  95     {
  96         HCERTSTORE rootStore = CertOpenSystemStoreW(0, rootW);
  97         PCCERT_CONTEXT cert = NULL, check;
  98
  99         do {
 100             cert = CertEnumCertificatesInStore(store, cert);
 101             if (cert)
 102             {
 103                 if (!(check = CRYPT_FindCertInStore(rootStore, cert)))
 104                     ret = FALSE;
 105                 else
 106                     CertFreeCertificateContext(check);
 107             }
 108         } while (ret && cert);
 109         if (cert)
 110             CertFreeCertificateContext(cert);
 111         CertCloseStore(rootStore, 0);
 112     }
 113     return ret;
 114 }
 115
 116 HCERTCHAINENGINE CRYPT_CreateChainEngine(HCERTSTORE root,
 117  PCERT_CHAIN_ENGINE_CONFIG pConfig)
 118 {
 119     static const WCHAR caW[] = { 'C','A',0 };
 120     static const WCHAR myW[] = { 'M','y',0 };
 121     static const WCHAR trustW[] = { 'T','r','u','s','t',0 };
 122     PCertificateChainEngine engine =
 123      CryptMemAlloc(sizeof(CertificateChainEngine));
 124
 125     if (engine)
 126     {
 127         HCERTSTORE worldStores[4];
 128
 129         engine->ref = 1;
 130         engine->hRoot = root;
 131         engine->hWorld = CertOpenStore(CERT_STORE_PROV_COLLECTION, 0, 0,
 132          CERT_STORE_CREATE_NEW_FLAG, NULL);
 133         worldStores[0] = CertDuplicateStore(engine->hRoot);
 134         worldStores[1] = CertOpenSystemStoreW(0, caW);
 135         worldStores[2] = CertOpenSystemStoreW(0, myW);
 136         worldStores[3] = CertOpenSystemStoreW(0, trustW);
 137         CRYPT_AddStoresToCollection(engine->hWorld,
 138          sizeof(worldStores) / sizeof(worldStores[0]), worldStores);
 139         CRYPT_AddStoresToCollection(engine->hWorld,
 140          pConfig->cAdditionalStore, pConfig->rghAdditionalStore);
 141         CRYPT_CloseStores(sizeof(worldStores) / sizeof(worldStores[0]),
 142          worldStores);
 143         engine->dwFlags = pConfig->dwFlags;
 144         engine->dwUrlRetrievalTimeout = pConfig->dwUrlRetrievalTimeout;
 145         engine->MaximumCachedCertificates =
 146          pConfig->MaximumCachedCertificates;
 147         if (pConfig->CycleDetectionModulus)
 148             engine->CycleDetectionModulus = pConfig->CycleDetectionModulus;
 149         else
 150             engine->CycleDetectionModulus = DEFAULT_CYCLE_MODULUS;
 151     }
 152     return engine;
 153 }
 154
 155 BOOL WINAPI CertCreateCertificateChainEngine(PCERT_CHAIN_ENGINE_CONFIG pConfig,
 156  HCERTCHAINENGINE *phChainEngine)
 157 {
 158     BOOL ret;
 159
 160     TRACE("(%p, %p)\n", pConfig, phChainEngine);
 161
 162     if (pConfig->cbSize != sizeof(*pConfig))
 163     {
 164         SetLastError(E_INVALIDARG);
 165         return FALSE;
 166     }
 167     *phChainEngine = NULL;
 168     ret = CRYPT_CheckRestrictedRoot(pConfig->hRestrictedRoot);
 169     if (ret)
 170     {
 171         HCERTSTORE root;
 172         HCERTCHAINENGINE engine;
 173
 174         if (pConfig->hRestrictedRoot)
 175             root = CertDuplicateStore(pConfig->hRestrictedRoot);
 176         else
 177             root = CertOpenSystemStoreW(0, rootW);
 178         engine = CRYPT_CreateChainEngine(root, pConfig);
 179         if (engine)
 180         {
 181             *phChainEngine = engine;
 182             ret = TRUE;
 183         }
 184         else
 185             ret = FALSE;
 186     }
 187     return ret;
 188 }
 189
 190 VOID WINAPI CertFreeCertificateChainEngine(HCERTCHAINENGINE hChainEngine)
 191 {
 192     PCertificateChainEngine engine = (PCertificateChainEngine)hChainEngine;
 193
 194     TRACE("(%p)\n", hChainEngine);
 195
 196     if (engine && InterlockedDecrement(&engine->ref) == 0)
 197     {
 198         CertCloseStore(engine->hWorld, 0);
 199         CertCloseStore(engine->hRoot, 0);
 200         CryptMemFree(engine);
 201     }
 202 }
 203
 204 static HCERTCHAINENGINE CRYPT_GetDefaultChainEngine(void)
 205 {
 206     if (!CRYPT_defaultChainEngine)
 207     {
 208         CERT_CHAIN_ENGINE_CONFIG config = { 0 };
 209         HCERTCHAINENGINE engine;
 210
 211         config.cbSize = sizeof(config);
 212         CertCreateCertificateChainEngine(&config, &engine);
 213         InterlockedCompareExchangePointer(&CRYPT_defaultChainEngine, engine,
 214          NULL);
 215         if (CRYPT_defaultChainEngine != engine)
 216             CertFreeCertificateChainEngine(engine);
 217     }
 218     return CRYPT_defaultChainEngine;
 219 }
 220
 221 void default_chain_engine_free(void)
 222 {
 223     CertFreeCertificateChainEngine(CRYPT_defaultChainEngine);
 224 }
 225
 226 typedef struct _CertificateChain
 227 {
 228     CERT_CHAIN_CONTEXT context;
 229     HCERTSTORE world;
 230     LONG ref;
 231 } CertificateChain, *PCertificateChain;
 232
 233 static inline BOOL CRYPT_IsCertificateSelfSigned(PCCERT_CONTEXT cert)
 234 {
 235     return CertCompareCertificateName(cert->dwCertEncodingType,
 236      &cert->pCertInfo->Subject, &cert->pCertInfo->Issuer);
 237 }
 238
 239 static void CRYPT_FreeChainElement(PCERT_CHAIN_ELEMENT element)
 240 {
 241     CertFreeCertificateContext(element->pCertContext);
 242     CryptMemFree(element);
 243 }
 244
 245 static void CRYPT_CheckSimpleChainForCycles(PCERT_SIMPLE_CHAIN chain)
 246 {
 247     DWORD i, j, cyclicCertIndex = 0;
 248
 249     /* O(n^2) - I don't think there's a faster way */
 250     for (i = 0; !cyclicCertIndex && i < chain->cElement; i++)
 251         for (j = i + 1; !cyclicCertIndex && j < chain->cElement; j++)
 252             if (CertCompareCertificate(X509_ASN_ENCODING,
 253              chain->rgpElement[i]->pCertContext->pCertInfo,
 254              chain->rgpElement[j]->pCertContext->pCertInfo))
 255                 cyclicCertIndex = j;
 256     if (cyclicCertIndex)
 257     {
 258         chain->rgpElement[cyclicCertIndex]->TrustStatus.dwErrorStatus
 259          |= CERT_TRUST_IS_CYCLIC | CERT_TRUST_INVALID_BASIC_CONSTRAINTS;
 260         /* Release remaining certs */
 261         for (i = cyclicCertIndex + 1; i < chain->cElement; i++)
 262             CRYPT_FreeChainElement(chain->rgpElement[i]);
 263         /* Truncate chain */
 264         chain->cElement = cyclicCertIndex + 1;
 265     }
 266 }
 267
 268 /* Checks whether the chain is cyclic by examining the last element's status */
 269 static inline BOOL CRYPT_IsSimpleChainCyclic(const CERT_SIMPLE_CHAIN *chain)
 270 {
 271     if (chain->cElement)
 272         return chain->rgpElement[chain->cElement - 1]->TrustStatus.dwErrorStatus
 273          & CERT_TRUST_IS_CYCLIC;
 274     else
 275         return FALSE;
 276 }
 277
 278 static inline void CRYPT_CombineTrustStatus(CERT_TRUST_STATUS *chainStatus,
 279  const CERT_TRUST_STATUS *elementStatus)
 280 {
 281     /* Any error that applies to an element also applies to a chain.. */
 282     chainStatus->dwErrorStatus |= elementStatus->dwErrorStatus;
 283     /* but the bottom nibble of an element's info status doesn't apply to the
 284      * chain.
 285      */
 286     chainStatus->dwInfoStatus |= (elementStatus->dwInfoStatus & 0xfffffff0);
 287 }
 288
 289 static BOOL CRYPT_AddCertToSimpleChain(const CertificateChainEngine *engine,
 290  PCERT_SIMPLE_CHAIN chain, PCCERT_CONTEXT cert, DWORD subjectInfoStatus)
 291 {
 292     BOOL ret = FALSE;
 293     PCERT_CHAIN_ELEMENT element = CryptMemAlloc(sizeof(CERT_CHAIN_ELEMENT));
 294
 295     if (element)
 296     {
 297         if (!chain->cElement)
 298             chain->rgpElement = CryptMemAlloc(sizeof(PCERT_CHAIN_ELEMENT));
 299         else
 300             chain->rgpElement = CryptMemRealloc(chain->rgpElement,
 301              (chain->cElement + 1) * sizeof(PCERT_CHAIN_ELEMENT));
 302         if (chain->rgpElement)
 303         {
 304             chain->rgpElement[chain->cElement++] = element;
 305             memset(element, 0, sizeof(CERT_CHAIN_ELEMENT));
 306             element->cbSize = sizeof(CERT_CHAIN_ELEMENT);
 307             element->pCertContext = CertDuplicateCertificateContext(cert);
 308             if (chain->cElement > 1)
 309                 chain->rgpElement[chain->cElement - 2]->TrustStatus.dwInfoStatus
 310                  = subjectInfoStatus;
 311             /* FIXME: initialize the rest of element */
 312             if (!(chain->cElement % engine->CycleDetectionModulus))
 313             {
 314                 CRYPT_CheckSimpleChainForCycles(chain);
 315                 /* Reinitialize the element pointer in case the chain is
 316                  * cyclic, in which case the chain is truncated.
 317                  */
 318                 element = chain->rgpElement[chain->cElement - 1];
 319             }
 320             CRYPT_CombineTrustStatus(&chain->TrustStatus,
 321              &element->TrustStatus);
 322             ret = TRUE;
 323         }
 324         else
 325             CryptMemFree(element);
 326     }
 327     return ret;
 328 }
 329
 330 static void CRYPT_FreeSimpleChain(PCERT_SIMPLE_CHAIN chain)
 331 {
 332     DWORD i;
 333
 334     for (i = 0; i < chain->cElement; i++)
 335         CRYPT_FreeChainElement(chain->rgpElement[i]);
 336     CryptMemFree(chain->rgpElement);
 337     CryptMemFree(chain);
 338 }
 339
 340 static void CRYPT_CheckTrustedStatus(HCERTSTORE hRoot,
 341  PCERT_CHAIN_ELEMENT rootElement)
 342 {
 343     PCCERT_CONTEXT trustedRoot = CRYPT_FindCertInStore(hRoot,
 344      rootElement->pCertContext);
 345
 346     if (!trustedRoot)
 347         rootElement->TrustStatus.dwErrorStatus |=
 348          CERT_TRUST_IS_UNTRUSTED_ROOT;
 349     else
 350         CertFreeCertificateContext(trustedRoot);
 351 }
 352
 353 static void CRYPT_CheckRootCert(HCERTCHAINENGINE hRoot,
 354  PCERT_CHAIN_ELEMENT rootElement)
 355 {
 356     PCCERT_CONTEXT root = rootElement->pCertContext;
 357
 358     if (!CryptVerifyCertificateSignatureEx(0, root->dwCertEncodingType,
 359      CRYPT_VERIFY_CERT_SIGN_SUBJECT_CERT, (void *)root,
 360      CRYPT_VERIFY_CERT_SIGN_ISSUER_CERT, (void *)root, 0, NULL))
 361     {
 362         TRACE_(chain)("Last certificate's signature is invalid\n");
 363         rootElement->TrustStatus.dwErrorStatus |=
 364          CERT_TRUST_IS_NOT_SIGNATURE_VALID;
 365     }
 366     CRYPT_CheckTrustedStatus(hRoot, rootElement);
 367 }
 368
 369 /* Decodes a cert's basic constraints extension (either szOID_BASIC_CONSTRAINTS
 370  * or szOID_BASIC_CONSTRAINTS2, whichever is present) into a
 371  * CERT_BASIC_CONSTRAINTS2_INFO.  If it neither extension is present, sets
 372  * constraints->fCA to defaultIfNotSpecified.
 373  * Returns FALSE if the extension is present but couldn't be decoded.
 374  */
 375 static BOOL CRYPT_DecodeBasicConstraints(PCCERT_CONTEXT cert,
 376  CERT_BASIC_CONSTRAINTS2_INFO *constraints, BOOL defaultIfNotSpecified)
 377 {
 378     BOOL ret = TRUE;
 379     PCERT_EXTENSION ext = CertFindExtension(szOID_BASIC_CONSTRAINTS,
 380      cert->pCertInfo->cExtension, cert->pCertInfo->rgExtension);
 381
 382     constraints->fPathLenConstraint = FALSE;
 383     if (ext)
 384     {
 385         CERT_BASIC_CONSTRAINTS_INFO *info;
 386         DWORD size = 0;
 387
 388         ret = CryptDecodeObjectEx(X509_ASN_ENCODING, szOID_BASIC_CONSTRAINTS,
 389          ext->Value.pbData, ext->Value.cbData, CRYPT_DECODE_ALLOC_FLAG,
 390          NULL, &info, &size);
 391         if (ret)
 392         {
 393             if (info->SubjectType.cbData == 1)
 394                 constraints->fCA =
 395                  info->SubjectType.pbData[0] & CERT_CA_SUBJECT_FLAG;
 396             LocalFree(info);
 397         }
 398     }
 399     else
 400     {
 401         ext = CertFindExtension(szOID_BASIC_CONSTRAINTS2,
 402          cert->pCertInfo->cExtension, cert->pCertInfo->rgExtension);
 403         if (ext)
 404         {
 405             DWORD size = sizeof(CERT_BASIC_CONSTRAINTS2_INFO);
 406
 407             ret = CryptDecodeObjectEx(X509_ASN_ENCODING,
 408              szOID_BASIC_CONSTRAINTS2, ext->Value.pbData, ext->Value.cbData,
 409              0, NULL, constraints, &size);
 410         }
 411         else
 412             constraints->fCA = defaultIfNotSpecified;
 413     }
 414     return ret;
 415 }
 416
 417 /* Checks element's basic constraints to see if it can act as a CA, with
 418  * remainingCAs CAs left in this chain.  In general, a cert must include the
 419  * basic constraints extension, with the CA flag asserted, in order to be
 420  * allowed to be a CA.  A V1 or V2 cert, which has no extensions, is also
 421  * allowed to be a CA if it's installed locally (in the engine's world store.)
 422  * This matches the expected usage in RFC 5280, section 4.2.1.9:  a conforming
 423  * CA MUST include the basic constraints extension in all certificates that are
 424  * used to validate digital signatures on certificates.  It also matches
 425  * section 6.1.4(k): "If a certificate is a v1 or v2 certificate, then the
 426  * application MUST either verify that the certificate is a CA certificate
 427  * through out-of-band means or reject the certificate." Rejecting the
 428  * certificate prohibits a large number of commonly used certificates, so
 429  * accepting locally installed ones is a compromise.
 430  * Root certificates are also allowed to be CAs even without a basic
 431  * constraints extension.  This is implied by RFC 5280, section 6.1:  the
 432  * root of a certificate chain's only requirement is that it was used to issue
 433  * the next certificate in the chain.
 434  * Updates chainConstraints with the element's constraints, if:
 435  * 1. chainConstraints doesn't have a path length constraint, or
 436  * 2. element's path length constraint is smaller than chainConstraints's
 437  * Sets *pathLengthConstraintViolated to TRUE if a path length violation
 438  * occurs.
 439  * Returns TRUE if the element can be a CA, and the length of the remaining
 440  * chain is valid.
 441  */
 442 static BOOL CRYPT_CheckBasicConstraintsForCA(PCertificateChainEngine engine,
 443  PCCERT_CONTEXT cert, CERT_BASIC_CONSTRAINTS2_INFO *chainConstraints,
 444  DWORD remainingCAs, BOOL isRoot, BOOL *pathLengthConstraintViolated)
 445 {
 446     BOOL validBasicConstraints, implicitCA = FALSE;
 447     CERT_BASIC_CONSTRAINTS2_INFO constraints;
 448
 449     if (isRoot)
 450         implicitCA = TRUE;
 451     else if (cert->pCertInfo->dwVersion == CERT_V1 ||
 452      cert->pCertInfo->dwVersion == CERT_V2)
 453     {
 454         BYTE hash[20];
 455         DWORD size = sizeof(hash);
 456
 457         if (CertGetCertificateContextProperty(cert, CERT_HASH_PROP_ID,
 458          hash, &size))
 459         {
 460             CRYPT_HASH_BLOB blob = { sizeof(hash), hash };
 461             PCCERT_CONTEXT localCert = CertFindCertificateInStore(
 462              engine->hWorld, cert->dwCertEncodingType, 0, CERT_FIND_SHA1_HASH,
 463              &blob, NULL);
 464
 465             if (localCert)
 466             {
 467                 CertFreeCertificateContext(localCert);
 468                 implicitCA = TRUE;
 469             }
 470         }
 471     }
 472     if ((validBasicConstraints = CRYPT_DecodeBasicConstraints(cert,
 473      &constraints, implicitCA)))
 474     {
 475         chainConstraints->fCA = constraints.fCA;
 476         if (!constraints.fCA)
 477         {
 478             TRACE_(chain)("chain element %d can't be a CA\n", remainingCAs + 1);
 479             validBasicConstraints = FALSE;
 480         }
 481         else if (constraints.fPathLenConstraint)
 482         {
 483             /* If the element has path length constraints, they apply to the
 484              * entire remaining chain.
 485              */
 486             if (!chainConstraints->fPathLenConstraint ||
 487              constraints.dwPathLenConstraint <
 488              chainConstraints->dwPathLenConstraint)
 489             {
 490                 TRACE_(chain)("setting path length constraint to %d\n",
 491                  chainConstraints->dwPathLenConstraint);
 492                 chainConstraints->fPathLenConstraint = TRUE;
 493                 chainConstraints->dwPathLenConstraint =
 494                  constraints.dwPathLenConstraint;
 495             }
 496         }
 497     }
 498     if (chainConstraints->fPathLenConstraint &&
 499      remainingCAs > chainConstraints->dwPathLenConstraint)
 500     {
 501         TRACE_(chain)("remaining CAs %d exceed max path length %d\n",
 502          remainingCAs, chainConstraints->dwPathLenConstraint);
 503         validBasicConstraints = FALSE;
 504         *pathLengthConstraintViolated = TRUE;
 505     }
 506     return validBasicConstraints;
 507 }
 508
 509 static BOOL url_matches(LPCWSTR constraint, LPCWSTR name,
 510  DWORD *trustErrorStatus)
 511 {
 512     BOOL match = FALSE;
 513
 514     TRACE("%s, %s\n", debugstr_w(constraint), debugstr_w(name));
 515
 516     if (!constraint)
 517         *trustErrorStatus |= CERT_TRUST_INVALID_NAME_CONSTRAINTS;
 518     else if (!name)
 519         ; /* no match */
 520     else if (constraint[0] == '.')
 521     {
 522         if (lstrlenW(name) > lstrlenW(constraint))
 523             match = !lstrcmpiW(name + lstrlenW(name) - lstrlenW(constraint),
 524              constraint);
 525     }
 526     else
 527         match = !lstrcmpiW(constraint, name);
 528     return match;
 529 }
 530
 531 static BOOL rfc822_name_matches(LPCWSTR constraint, LPCWSTR name,
 532  DWORD *trustErrorStatus)
 533 {
 534     BOOL match = FALSE;
 535     LPCWSTR at;
 536
 537     TRACE("%s, %s\n", debugstr_w(constraint), debugstr_w(name));
 538
 539     if (!constraint)
 540         *trustErrorStatus |= CERT_TRUST_INVALID_NAME_CONSTRAINTS;
 541     else if (!name)
 542         ; /* no match */
 543     else if ((at = strchrW(constraint, '@')))
 544         match = !lstrcmpiW(constraint, name);
 545     else
 546     {
 547         if ((at = strchrW(name, '@')))
 548             match = url_matches(constraint, at + 1, trustErrorStatus);
 549         else
 550             match = !lstrcmpiW(constraint, name);
 551     }
 552     return match;
 553 }
 554
 555 static BOOL dns_name_matches(LPCWSTR constraint, LPCWSTR name,
 556  DWORD *trustErrorStatus)
 557 {
 558     BOOL match = FALSE;
 559
 560     TRACE("%s, %s\n", debugstr_w(constraint), debugstr_w(name));
 561
 562     if (!constraint)
 563         *trustErrorStatus |= CERT_TRUST_INVALID_NAME_CONSTRAINTS;
 564     else if (!name)
 565         ; /* no match */
 566     else if (lstrlenW(name) >= lstrlenW(constraint))
 567         match = !lstrcmpiW(name + lstrlenW(name) - lstrlenW(constraint),
 568          constraint);
 569     /* else:  name is too short, no match */
 570
 571     return match;
 572 }
 573
 574 static BOOL ip_address_matches(const CRYPT_DATA_BLOB *constraint,
 575  const CRYPT_DATA_BLOB *name, DWORD *trustErrorStatus)
 576 {
 577     BOOL match = FALSE;
 578
 579     TRACE("(%d, %p), (%d, %p)\n", constraint->cbData, constraint->pbData,
 580      name->cbData, name->pbData);
 581
 582     /* RFC5280, section 4.2.1.10, iPAddress syntax: either 8 or 32 bytes, for
 583      * IPv4 or IPv6 addresses, respectively.
 584      */
 585     if (constraint->cbData != sizeof(DWORD) * 2 && constraint->cbData != 32)
 586         *trustErrorStatus |= CERT_TRUST_INVALID_NAME_CONSTRAINTS;
 587     else if (name->cbData == sizeof(DWORD) &&
 588      constraint->cbData == sizeof(DWORD) * 2)
 589     {
 590         DWORD subnet, mask, addr;
 591
 592         memcpy(&subnet, constraint->pbData, sizeof(subnet));
 593         memcpy(&mask, constraint->pbData + sizeof(subnet), sizeof(mask));
 594         memcpy(&addr, name->pbData, sizeof(addr));
 595         /* These are really in big-endian order, but for equality matching we
 596          * don't need to swap to host order
 597          */
 598         match = (subnet & mask) == (addr & mask);
 599     }
 600     else if (name->cbData == 16 && constraint->cbData == 32)
 601     {
 602         const BYTE *subnet, *mask, *addr;
 603         DWORD i;
 604
 605         subnet = constraint->pbData;
 606         mask = constraint->pbData + 16;
 607         addr = name->pbData;
 608         match = TRUE;
 609         for (i = 0; match && i < 16; i++)
 610             if ((subnet[i] & mask[i]) != (addr[i] & mask[i]))
 611                 match = FALSE;
 612     }
 613     /* else: name is wrong size, no match */
 614
 615     return match;
 616 }
 617
 618 static void CRYPT_FindMatchingNameEntry(const CERT_ALT_NAME_ENTRY *constraint,
 619  const CERT_ALT_NAME_INFO *subjectName, DWORD *trustErrorStatus,
 620  DWORD errorIfFound, DWORD errorIfNotFound)
 621 {
 622     DWORD i;
 623     BOOL match = FALSE;
 624
 625     for (i = 0; i < subjectName->cAltEntry; i++)
 626     {
 627         if (subjectName->rgAltEntry[i].dwAltNameChoice ==
 628          constraint->dwAltNameChoice)
 629         {
 630             switch (constraint->dwAltNameChoice)
 631             {
 632             case CERT_ALT_NAME_RFC822_NAME:
 633                 match = rfc822_name_matches(constraint->u.pwszURL,
 634                  subjectName->rgAltEntry[i].u.pwszURL, trustErrorStatus);
 635                 break;
 636             case CERT_ALT_NAME_DNS_NAME:
 637                 match = dns_name_matches(constraint->u.pwszURL,
 638                  subjectName->rgAltEntry[i].u.pwszURL, trustErrorStatus);
 639                 break;
 640             case CERT_ALT_NAME_URL:
 641                 match = url_matches(constraint->u.pwszURL,
 642                  subjectName->rgAltEntry[i].u.pwszURL, trustErrorStatus);
 643                 break;
 644             case CERT_ALT_NAME_IP_ADDRESS:
 645                 match = ip_address_matches(&constraint->u.IPAddress,
 646                  &subjectName->rgAltEntry[i].u.IPAddress, trustErrorStatus);
 647                 break;
 648             case CERT_ALT_NAME_DIRECTORY_NAME:
 649             default:
 650                 ERR("name choice %d unsupported in this context\n",
 651                  constraint->dwAltNameChoice);
 652                 *trustErrorStatus |=
 653                  CERT_TRUST_HAS_NOT_SUPPORTED_NAME_CONSTRAINT;
 654             }
 655         }
 656     }
 657     *trustErrorStatus |= match ? errorIfFound : errorIfNotFound;
 658 }
 659
 660 static inline PCERT_EXTENSION get_subject_alt_name_ext(const CERT_INFO *cert)
 661 {
 662     PCERT_EXTENSION ext;
 663
 664     ext = CertFindExtension(szOID_SUBJECT_ALT_NAME2,
 665      cert->cExtension, cert->rgExtension);
 666     if (!ext)
 667         ext = CertFindExtension(szOID_SUBJECT_ALT_NAME,
 668          cert->cExtension, cert->rgExtension);
 669     return ext;
 670 }
 671
 672 static void CRYPT_CheckNameConstraints(
 673  const CERT_NAME_CONSTRAINTS_INFO *nameConstraints, const CERT_INFO *cert,
 674  DWORD *trustErrorStatus)
 675 {
 676     /* If there aren't any existing constraints, don't bother checking */
 677     if (nameConstraints->cPermittedSubtree || nameConstraints->cExcludedSubtree)
 678     {
 679         CERT_EXTENSION *ext = get_subject_alt_name_ext(cert);
 680
 681         if (ext)
 682         {
 683             CERT_ALT_NAME_INFO *subjectName;
 684             DWORD size;
 685
 686             if (CryptDecodeObjectEx(X509_ASN_ENCODING, X509_ALTERNATE_NAME,
 687              ext->Value.pbData, ext->Value.cbData,
 688              CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL,
 689              &subjectName, &size))
 690             {
 691                 DWORD i;
 692
 693                 for (i = 0; i < nameConstraints->cExcludedSubtree; i++)
 694                     CRYPT_FindMatchingNameEntry(
 695                      &nameConstraints->rgExcludedSubtree[i].Base, subjectName,
 696                      trustErrorStatus,
 697                      CERT_TRUST_HAS_EXCLUDED_NAME_CONSTRAINT, 0);
 698                 for (i = 0; i < nameConstraints->cPermittedSubtree; i++)
 699                     CRYPT_FindMatchingNameEntry(
 700                      &nameConstraints->rgPermittedSubtree[i].Base, subjectName,
 701                      trustErrorStatus,
 702                      CERT_TRUST_HAS_NOT_DEFINED_NAME_CONSTRAINT,
 703                      CERT_TRUST_HAS_NOT_PERMITTED_NAME_CONSTRAINT);
 704                 LocalFree(subjectName);
 705             }
 706             else
 707                 *trustErrorStatus |=
 708                  CERT_TRUST_INVALID_EXTENSION |
 709                  CERT_TRUST_INVALID_NAME_CONSTRAINTS;
 710         }
 711         else
 712         {
 713             if (nameConstraints->cPermittedSubtree)
 714                 *trustErrorStatus |=
 715                  CERT_TRUST_HAS_NOT_DEFINED_NAME_CONSTRAINT |
 716                  CERT_TRUST_HAS_NOT_PERMITTED_NAME_CONSTRAINT;
 717             if (nameConstraints->cExcludedSubtree)
 718                 *trustErrorStatus |=
 719                  CERT_TRUST_HAS_EXCLUDED_NAME_CONSTRAINT;
 720         }
 721     }
 722 }
 723
 724 /* Gets cert's name constraints, if any.  Free with LocalFree. */
 725 static CERT_NAME_CONSTRAINTS_INFO *CRYPT_GetNameConstraints(CERT_INFO *cert)
 726 {
 727     CERT_NAME_CONSTRAINTS_INFO *info = NULL;
 728
 729     CERT_EXTENSION *ext;
 730
 731     if ((ext = CertFindExtension(szOID_NAME_CONSTRAINTS, cert->cExtension,
 732      cert->rgExtension)))
 733     {
 734         DWORD size;
 735
 736         CryptDecodeObjectEx(X509_ASN_ENCODING, X509_NAME_CONSTRAINTS,
 737          ext->Value.pbData, ext->Value.cbData,
 738          CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL, &info,
 739          &size);
 740     }
 741     return info;
 742 }
 743
 744 static BOOL CRYPT_IsValidNameConstraint(const CERT_NAME_CONSTRAINTS_INFO *info)
 745 {
 746     DWORD i;
 747     BOOL ret = TRUE;
 748
 749     /* Check that none of the constraints specifies a minimum or a maximum.
 750      * See RFC 5280, section 4.2.1.10:
 751      * "Within this profile, the minimum and maximum fields are not used with
 752      *  any name forms, thus, the minimum MUST be zero, and maximum MUST be
 753      *  absent.  However, if an application encounters a critical name
 754      *  constraints extension that specifies other values for minimum or
 755      *  maximum for a name form that appears in a subsequent certificate, the
 756      *  application MUST either process these fields or reject the
 757      *  certificate."
 758      * Since it gives no guidance as to how to process these fields, we
 759      * reject any name constraint that contains them.
 760      */
 761     for (i = 0; ret && i < info->cPermittedSubtree; i++)
 762         if (info->rgPermittedSubtree[i].dwMinimum ||
 763          info->rgPermittedSubtree[i].fMaximum)
 764         {
 765             TRACE_(chain)("found a minimum or maximum in permitted subtrees\n");
 766             ret = FALSE;
 767         }
 768     for (i = 0; ret && i < info->cExcludedSubtree; i++)
 769         if (info->rgExcludedSubtree[i].dwMinimum ||
 770          info->rgExcludedSubtree[i].fMaximum)
 771         {
 772             TRACE_(chain)("found a minimum or maximum in excluded subtrees\n");
 773             ret = FALSE;
 774         }
 775     return ret;
 776 }
 777
 778 static void CRYPT_CheckChainNameConstraints(PCERT_SIMPLE_CHAIN chain)
 779 {
 780     int i, j;
 781
 782     /* Microsoft's implementation appears to violate RFC 3280:  according to
 783      * MSDN, the various CERT_TRUST_*_NAME_CONSTRAINT errors are set if a CA's
 784      * name constraint is violated in the end cert.  According to RFC 3280,
 785      * the constraints should be checked against every subsequent certificate
 786      * in the chain, not just the end cert.
 787      * Microsoft's implementation also sets the name constraint errors on the
 788      * certs whose constraints were violated, not on the certs that violated
 789      * them.
 790      * In order to be error-compatible with Microsoft's implementation, while
 791      * still adhering to RFC 3280, I use a O(n ^ 2) algorithm to check name
 792      * constraints.
 793      */
 794     for (i = chain->cElement - 1; i > 0; i--)
 795     {
 796         CERT_NAME_CONSTRAINTS_INFO *nameConstraints;
 797
 798         if ((nameConstraints = CRYPT_GetNameConstraints(
 799          chain->rgpElement[i]->pCertContext->pCertInfo)))
 800         {
 801             if (!CRYPT_IsValidNameConstraint(nameConstraints))
 802                 chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
 803                  CERT_TRUST_HAS_NOT_SUPPORTED_NAME_CONSTRAINT;
 804             else
 805             {
 806                 for (j = i - 1; j >= 0; j--)
 807                 {
 808                     DWORD errorStatus = 0;
 809
 810                     /* According to RFC 3280, self-signed certs don't have name
 811                      * constraints checked unless they're the end cert.
 812                      */
 813                     if (j == 0 || !CRYPT_IsCertificateSelfSigned(
 814                      chain->rgpElement[j]->pCertContext))
 815                     {
 816                         CRYPT_CheckNameConstraints(nameConstraints,
 817                          chain->rgpElement[j]->pCertContext->pCertInfo,
 818                          &errorStatus);
 819                         chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
 820                          errorStatus;
 821                     }
 822                 }
 823             }
 824             LocalFree(nameConstraints);
 825         }
 826     }
 827 }
 828
 829 static LPWSTR name_value_to_str(const CERT_NAME_BLOB *name)
 830 {
 831     DWORD len = cert_name_to_str_with_indent(X509_ASN_ENCODING, 0, name,
 832      CERT_SIMPLE_NAME_STR, NULL, 0);
 833     LPWSTR str = NULL;
 834
 835     if (len)
 836     {
 837         str = CryptMemAlloc(len * sizeof(WCHAR));
 838         if (str)
 839             cert_name_to_str_with_indent(X509_ASN_ENCODING, 0, name,
 840              CERT_SIMPLE_NAME_STR, str, len);
 841     }
 842     return str;
 843 }
 844
 845 static void dump_alt_name_entry(const CERT_ALT_NAME_ENTRY *entry)
 846 {
 847     LPWSTR str;
 848
 849     switch (entry->dwAltNameChoice)
 850     {
 851     case CERT_ALT_NAME_OTHER_NAME:
 852         TRACE_(chain)("CERT_ALT_NAME_OTHER_NAME, oid = %s\n",
 853          debugstr_a(entry->u.pOtherName->pszObjId));
 854          break;
 855     case CERT_ALT_NAME_RFC822_NAME:
 856         TRACE_(chain)("CERT_ALT_NAME_RFC822_NAME: %s\n",
 857          debugstr_w(entry->u.pwszRfc822Name));
 858         break;
 859     case CERT_ALT_NAME_DNS_NAME:
 860         TRACE_(chain)("CERT_ALT_NAME_DNS_NAME: %s\n",
 861          debugstr_w(entry->u.pwszDNSName));
 862         break;
 863     case CERT_ALT_NAME_DIRECTORY_NAME:
 864         str = name_value_to_str(&entry->u.DirectoryName);
 865         TRACE_(chain)("CERT_ALT_NAME_DIRECTORY_NAME: %s\n", debugstr_w(str));
 866         CryptMemFree(str);
 867         break;
 868     case CERT_ALT_NAME_URL:
 869         TRACE_(chain)("CERT_ALT_NAME_URL: %s\n", debugstr_w(entry->u.pwszURL));
 870         break;
 871     case CERT_ALT_NAME_IP_ADDRESS:
 872         TRACE_(chain)("CERT_ALT_NAME_IP_ADDRESS: %d bytes\n",
 873          entry->u.IPAddress.cbData);
 874         break;
 875     case CERT_ALT_NAME_REGISTERED_ID:
 876         TRACE_(chain)("CERT_ALT_NAME_REGISTERED_ID: %s\n",
 877          debugstr_a(entry->u.pszRegisteredID));
 878         break;
 879     default:
 880         TRACE_(chain)("dwAltNameChoice = %d\n", entry->dwAltNameChoice);
 881     }
 882 }
 883
 884 static void dump_alt_name(LPCSTR type, const CERT_EXTENSION *ext)
 885 {
 886     CERT_ALT_NAME_INFO *name;
 887     DWORD size;
 888
 889     TRACE_(chain)("%s:\n", type);
 890     if (CryptDecodeObjectEx(X509_ASN_ENCODING, X509_ALTERNATE_NAME,
 891      ext->Value.pbData, ext->Value.cbData,
 892      CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL, &name, &size))
 893     {
 894         DWORD i;
 895
 896         TRACE_(chain)("%d alt name entries:\n", name->cAltEntry);
 897         for (i = 0; i < name->cAltEntry; i++)
 898             dump_alt_name_entry(&name->rgAltEntry[i]);
 899         LocalFree(name);
 900     }
 901 }
 902
 903 static void dump_basic_constraints(const CERT_EXTENSION *ext)
 904 {
 905     CERT_BASIC_CONSTRAINTS_INFO *info;
 906     DWORD size = 0;
 907
 908     if (CryptDecodeObjectEx(X509_ASN_ENCODING, szOID_BASIC_CONSTRAINTS,
 909      ext->Value.pbData, ext->Value.cbData, CRYPT_DECODE_ALLOC_FLAG,
 910      NULL, &info, &size))
 911     {
 912         TRACE_(chain)("SubjectType: %02x\n", info->SubjectType.pbData[0]);
 913         TRACE_(chain)("%s path length constraint\n",
 914          info->fPathLenConstraint ? "has" : "doesn't have");
 915         TRACE_(chain)("path length=%d\n", info->dwPathLenConstraint);
 916         LocalFree(info);
 917     }
 918 }
 919
 920 static void dump_basic_constraints2(const CERT_EXTENSION *ext)
 921 {
 922     CERT_BASIC_CONSTRAINTS2_INFO constraints;
 923     DWORD size = sizeof(CERT_BASIC_CONSTRAINTS2_INFO);
 924
 925     if (CryptDecodeObjectEx(X509_ASN_ENCODING,
 926      szOID_BASIC_CONSTRAINTS2, ext->Value.pbData, ext->Value.cbData,
 927      0, NULL, &constraints, &size))
 928     {
 929         TRACE_(chain)("basic constraints:\n");
 930         TRACE_(chain)("can%s be a CA\n", constraints.fCA ? "" : "not");
 931         TRACE_(chain)("%s path length constraint\n",
 932          constraints.fPathLenConstraint ? "has" : "doesn't have");
 933         TRACE_(chain)("path length=%d\n", constraints.dwPathLenConstraint);
 934     }
 935 }
 936
 937 static void dump_key_usage(const CERT_EXTENSION *ext)
 938 {
 939     CRYPT_BIT_BLOB usage;
 940     DWORD size = sizeof(usage);
 941
 942     if (CryptDecodeObjectEx(X509_ASN_ENCODING, X509_BITS, ext->Value.pbData,
 943      ext->Value.cbData, CRYPT_DECODE_NOCOPY_FLAG, NULL, &usage, &size))
 944     {
 945 #define trace_usage_bit(bits, bit) \
 946  if ((bits) & (bit)) TRACE_(chain)("%s\n", #bit)
 947         if (usage.cbData)
 948         {
 949             trace_usage_bit(usage.pbData[0], CERT_DIGITAL_SIGNATURE_KEY_USAGE);
 950             trace_usage_bit(usage.pbData[0], CERT_NON_REPUDIATION_KEY_USAGE);
 951             trace_usage_bit(usage.pbData[0], CERT_KEY_ENCIPHERMENT_KEY_USAGE);
 952             trace_usage_bit(usage.pbData[0], CERT_DATA_ENCIPHERMENT_KEY_USAGE);
 953             trace_usage_bit(usage.pbData[0], CERT_KEY_AGREEMENT_KEY_USAGE);
 954             trace_usage_bit(usage.pbData[0], CERT_KEY_CERT_SIGN_KEY_USAGE);
 955             trace_usage_bit(usage.pbData[0], CERT_CRL_SIGN_KEY_USAGE);
 956             trace_usage_bit(usage.pbData[0], CERT_ENCIPHER_ONLY_KEY_USAGE);
 957         }
 958 #undef trace_usage_bit
 959         if (usage.cbData > 1 && usage.pbData[1] & CERT_DECIPHER_ONLY_KEY_USAGE)
 960             TRACE_(chain)("CERT_DECIPHER_ONLY_KEY_USAGE\n");
 961     }
 962 }
 963
 964 static void dump_general_subtree(const CERT_GENERAL_SUBTREE *subtree)
 965 {
 966     dump_alt_name_entry(&subtree->Base);
 967     TRACE_(chain)("dwMinimum = %d, fMaximum = %d, dwMaximum = %d\n",
 968      subtree->dwMinimum, subtree->fMaximum, subtree->dwMaximum);
 969 }
 970
 971 static void dump_name_constraints(const CERT_EXTENSION *ext)
 972 {
 973     CERT_NAME_CONSTRAINTS_INFO *nameConstraints;
 974     DWORD size;
 975
 976     if (CryptDecodeObjectEx(X509_ASN_ENCODING, X509_NAME_CONSTRAINTS,
 977      ext->Value.pbData, ext->Value.cbData,
 978      CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL, &nameConstraints,
 979      &size))
 980     {
 981         DWORD i;
 982
 983         TRACE_(chain)("%d permitted subtrees:\n",
 984          nameConstraints->cPermittedSubtree);
 985         for (i = 0; i < nameConstraints->cPermittedSubtree; i++)
 986             dump_general_subtree(&nameConstraints->rgPermittedSubtree[i]);
 987         TRACE_(chain)("%d excluded subtrees:\n",
 988          nameConstraints->cExcludedSubtree);
 989         for (i = 0; i < nameConstraints->cExcludedSubtree; i++)
 990             dump_general_subtree(&nameConstraints->rgExcludedSubtree[i]);
 991         LocalFree(nameConstraints);
 992     }
 993 }
 994
 995 static void dump_cert_policies(const CERT_EXTENSION *ext)
 996 {
 997     CERT_POLICIES_INFO *policies;
 998     DWORD size;
 999
1000     if (CryptDecodeObjectEx(X509_ASN_ENCODING, X509_CERT_POLICIES,
1001      ext->Value.pbData, ext->Value.cbData, CRYPT_DECODE_ALLOC_FLAG, NULL,
1002      &policies, &size))
1003     {
1004         DWORD i, j;
1005
1006         TRACE_(chain)("%d policies:\n", policies->cPolicyInfo);
1007         for (i = 0; i < policies->cPolicyInfo; i++)
1008         {
1009             TRACE_(chain)("policy identifier: %s\n",
1010              debugstr_a(policies->rgPolicyInfo[i].pszPolicyIdentifier));
1011             TRACE_(chain)("%d policy qualifiers:\n",
1012              policies->rgPolicyInfo[i].cPolicyQualifier);
1013             for (j = 0; j < policies->rgPolicyInfo[i].cPolicyQualifier; j++)
1014                 TRACE_(chain)("%s\n", debugstr_a(
1015                  policies->rgPolicyInfo[i].rgPolicyQualifier[j].
1016                  pszPolicyQualifierId));
1017         }
1018         LocalFree(policies);
1019     }
1020 }
1021
1022 static void dump_enhanced_key_usage(const CERT_EXTENSION *ext)
1023 {
1024     CERT_ENHKEY_USAGE *usage;
1025     DWORD size;
1026
1027     if (CryptDecodeObjectEx(X509_ASN_ENCODING, X509_ENHANCED_KEY_USAGE,
1028      ext->Value.pbData, ext->Value.cbData, CRYPT_DECODE_ALLOC_FLAG, NULL,
1029      &usage, &size))
1030     {
1031         DWORD i;
1032
1033         TRACE_(chain)("%d usages:\n", usage->cUsageIdentifier);
1034         for (i = 0; i < usage->cUsageIdentifier; i++)
1035             TRACE_(chain)("%s\n", usage->rgpszUsageIdentifier[i]);
1036         LocalFree(usage);
1037     }
1038 }
1039
1040 static void dump_netscape_cert_type(const CERT_EXTENSION *ext)
1041 {
1042     CRYPT_BIT_BLOB usage;
1043     DWORD size = sizeof(usage);
1044
1045     if (CryptDecodeObjectEx(X509_ASN_ENCODING, X509_BITS, ext->Value.pbData,
1046      ext->Value.cbData, CRYPT_DECODE_NOCOPY_FLAG, NULL, &usage, &size))
1047     {
1048 #define trace_cert_type_bit(bits, bit) \
1049  if ((bits) & (bit)) TRACE_(chain)("%s\n", #bit)
1050         if (usage.cbData)
1051         {
1052             trace_cert_type_bit(usage.pbData[0],
1053              NETSCAPE_SSL_CLIENT_AUTH_CERT_TYPE);
1054             trace_cert_type_bit(usage.pbData[0],
1055              NETSCAPE_SSL_SERVER_AUTH_CERT_TYPE);
1056             trace_cert_type_bit(usage.pbData[0], NETSCAPE_SMIME_CERT_TYPE);
1057             trace_cert_type_bit(usage.pbData[0], NETSCAPE_SIGN_CERT_TYPE);
1058             trace_cert_type_bit(usage.pbData[0], NETSCAPE_SSL_CA_CERT_TYPE);
1059             trace_cert_type_bit(usage.pbData[0], NETSCAPE_SMIME_CA_CERT_TYPE);
1060             trace_cert_type_bit(usage.pbData[0], NETSCAPE_SIGN_CA_CERT_TYPE);
1061         }
1062 #undef trace_cert_type_bit
1063     }
1064 }
1065
1066 static void dump_extension(const CERT_EXTENSION *ext)
1067 {
1068     TRACE_(chain)("%s (%scritical)\n", debugstr_a(ext->pszObjId),
1069      ext->fCritical ? "" : "not ");
1070     if (!strcmp(ext->pszObjId, szOID_SUBJECT_ALT_NAME))
1071         dump_alt_name("subject alt name", ext);
1072     else  if (!strcmp(ext->pszObjId, szOID_ISSUER_ALT_NAME))
1073         dump_alt_name("issuer alt name", ext);
1074     else if (!strcmp(ext->pszObjId, szOID_BASIC_CONSTRAINTS))
1075         dump_basic_constraints(ext);
1076     else if (!strcmp(ext->pszObjId, szOID_KEY_USAGE))
1077         dump_key_usage(ext);
1078     else if (!strcmp(ext->pszObjId, szOID_SUBJECT_ALT_NAME2))
1079         dump_alt_name("subject alt name 2", ext);
1080     else if (!strcmp(ext->pszObjId, szOID_ISSUER_ALT_NAME2))
1081         dump_alt_name("issuer alt name 2", ext);
1082     else if (!strcmp(ext->pszObjId, szOID_BASIC_CONSTRAINTS2))
1083         dump_basic_constraints2(ext);
1084     else if (!strcmp(ext->pszObjId, szOID_NAME_CONSTRAINTS))
1085         dump_name_constraints(ext);
1086     else if (!strcmp(ext->pszObjId, szOID_CERT_POLICIES))
1087         dump_cert_policies(ext);
1088     else if (!strcmp(ext->pszObjId, szOID_ENHANCED_KEY_USAGE))
1089         dump_enhanced_key_usage(ext);
1090     else if (!strcmp(ext->pszObjId, szOID_NETSCAPE_CERT_TYPE))
1091         dump_netscape_cert_type(ext);
1092 }
1093
1094 static LPCWSTR filetime_to_str(const FILETIME *time)
1095 {
1096     static WCHAR date[80];
1097     WCHAR dateFmt[80]; /* sufficient for all versions of LOCALE_SSHORTDATE */
1098     SYSTEMTIME sysTime;
1099
1100     if (!time) return NULL;
1101
1102     GetLocaleInfoW(LOCALE_SYSTEM_DEFAULT, LOCALE_SSHORTDATE, dateFmt,
1103      sizeof(dateFmt) / sizeof(dateFmt[0]));
1104     FileTimeToSystemTime(time, &sysTime);
1105     GetDateFormatW(LOCALE_SYSTEM_DEFAULT, 0, &sysTime, dateFmt, date,
1106      sizeof(date) / sizeof(date[0]));
1107     return date;
1108 }
1109
1110 static void dump_element(PCCERT_CONTEXT cert)
1111 {
1112     LPWSTR name = NULL;
1113     DWORD len, i;
1114
1115     TRACE_(chain)("%p\n", cert);
1116     len = CertGetNameStringW(cert, CERT_NAME_SIMPLE_DISPLAY_TYPE,
1117      CERT_NAME_ISSUER_FLAG, NULL, NULL, 0);
1118     name = CryptMemAlloc(len * sizeof(WCHAR));
1119     if (name)
1120     {
1121         CertGetNameStringW(cert, CERT_NAME_SIMPLE_DISPLAY_TYPE,
1122          CERT_NAME_ISSUER_FLAG, NULL, name, len);
1123         TRACE_(chain)("issued by %s\n", debugstr_w(name));
1124         CryptMemFree(name);
1125     }
1126     len = CertGetNameStringW(cert, CERT_NAME_SIMPLE_DISPLAY_TYPE, 0, NULL,
1127      NULL, 0);
1128     name = CryptMemAlloc(len * sizeof(WCHAR));
1129     if (name)
1130     {
1131         CertGetNameStringW(cert, CERT_NAME_SIMPLE_DISPLAY_TYPE, 0, NULL,
1132          name, len);
1133         TRACE_(chain)("issued to %s\n", debugstr_w(name));
1134         CryptMemFree(name);
1135     }
1136     TRACE_(chain)("valid from %s to %s\n",
1137      debugstr_w(filetime_to_str(&cert->pCertInfo->NotBefore)),
1138      debugstr_w(filetime_to_str(&cert->pCertInfo->NotAfter)));
1139     TRACE_(chain)("%d extensions\n", cert->pCertInfo->cExtension);
1140     for (i = 0; i < cert->pCertInfo->cExtension; i++)
1141         dump_extension(&cert->pCertInfo->rgExtension[i]);
1142 }
1143
1144 static BOOL CRYPT_KeyUsageValid(PCertificateChainEngine engine,
1145  PCCERT_CONTEXT cert, BOOL isRoot, BOOL isCA, DWORD index)
1146 {
1147     PCERT_EXTENSION ext;
1148     BOOL ret;
1149     BYTE usageBits = 0;
1150
1151     ext = CertFindExtension(szOID_KEY_USAGE, cert->pCertInfo->cExtension,
1152      cert->pCertInfo->rgExtension);
1153     if (ext)
1154     {
1155         CRYPT_BIT_BLOB usage;
1156         DWORD size = sizeof(usage);
1157
1158         ret = CryptDecodeObjectEx(cert->dwCertEncodingType, X509_BITS,
1159          ext->Value.pbData, ext->Value.cbData, CRYPT_DECODE_NOCOPY_FLAG, NULL,
1160          &usage, &size);
1161         if (!ret)
1162             return FALSE;
1163         else if (usage.cbData > 2)
1164         {
1165             /* The key usage extension only defines 9 bits => no more than 2
1166              * bytes are needed to encode all known usages.
1167              */
1168             return FALSE;
1169         }
1170         else
1171         {
1172             /* The only bit relevant to chain validation is the keyCertSign
1173              * bit, which is always in the least significant byte of the
1174              * key usage bits.
1175              */
1176             usageBits = usage.pbData[usage.cbData - 1];
1177         }
1178     }
1179     if (isCA)
1180     {
1181         if (!ext)
1182         {
1183             /* MS appears to violate RFC 5280, section 4.2.1.3 (Key Usage)
1184              * here.  Quoting the RFC:
1185              * "This [key usage] extension MUST appear in certificates that
1186              * contain public keys that are used to validate digital signatures
1187              * on other public key certificates or CRLs."
1188              * MS appears to accept certs that do not contain key usage
1189              * extensions as CA certs.  V1 and V2 certificates did not have
1190              * extensions, and many root certificates are V1 certificates, so
1191              * perhaps this is prudent.  On the other hand, MS also accepts V3
1192              * certs without key usage extensions.  We are more restrictive:
1193              * we accept locally installed V1 or V2 certs as CA certs.
1194              * We also accept a lack of key usage extension on root certs,
1195              * which is implied in RFC 5280, section 6.1:  the trust anchor's
1196              * only requirement is that it was used to issue the next
1197              * certificate in the chain.
1198              */
1199             if (isRoot)
1200                 ret = TRUE;
1201             else if (cert->pCertInfo->dwVersion == CERT_V1 ||
1202              cert->pCertInfo->dwVersion == CERT_V2)
1203             {
1204                 PCCERT_CONTEXT localCert = CRYPT_FindCertInStore(
1205                  engine->hWorld, cert);
1206
1207                 ret = localCert != NULL;
1208                 CertFreeCertificateContext(localCert);
1209             }
1210             else
1211                 ret = FALSE;
1212             if (!ret)
1213                 WARN_(chain)("no key usage extension on a CA cert\n");
1214         }
1215         else
1216         {
1217             if (!(usageBits & CERT_KEY_CERT_SIGN_KEY_USAGE))
1218             {
1219                 WARN_(chain)("keyCertSign not asserted on a CA cert\n");
1220                 ret = FALSE;
1221             }
1222             else
1223                 ret = TRUE;
1224         }
1225     }
1226     else
1227     {
1228         if (ext && (usageBits & CERT_KEY_CERT_SIGN_KEY_USAGE))
1229         {
1230             WARN_(chain)("keyCertSign asserted on a non-CA cert\n");
1231             ret = FALSE;
1232         }
1233         else
1234             ret = TRUE;
1235     }
1236     return ret;
1237 }
1238
1239 static BOOL CRYPT_ExtendedKeyUsageValidForCA(PCCERT_CONTEXT cert)
1240 {
1241     PCERT_EXTENSION ext;
1242     BOOL ret;
1243
1244     /* RFC 5280, section 4.2.1.12:  "In general, this extension will only
1245      * appear in end entity certificates."  And, "If a certificate contains
1246      * both a key usage extension and an extended key usage extension, then
1247      * both extensions MUST be processed independently and the certificate MUST
1248      * only be used for a purpose consistent with both extensions."  This seems
1249      * to imply that it should be checked if present, and ignored if not.
1250      * Unfortunately some CAs, e.g. the Thawte SGC CA, don't include the code
1251      * signing extended key usage, whereas they do include the keyCertSign
1252      * key usage.  Thus, when checking for a CA, we only require the
1253      * code signing extended key usage if the extended key usage is critical.
1254      */
1255     ext = CertFindExtension(szOID_ENHANCED_KEY_USAGE,
1256      cert->pCertInfo->cExtension, cert->pCertInfo->rgExtension);
1257     if (ext && ext->fCritical)
1258     {
1259         CERT_ENHKEY_USAGE *usage;
1260         DWORD size;
1261
1262         ret = CryptDecodeObjectEx(cert->dwCertEncodingType,
1263          X509_ENHANCED_KEY_USAGE, ext->Value.pbData, ext->Value.cbData,
1264          CRYPT_DECODE_ALLOC_FLAG, NULL, &usage, &size);
1265         if (ret)
1266         {
1267             DWORD i;
1268
1269             /* Explicitly require the code signing extended key usage for a CA
1270              * with an extended key usage extension.  That is, don't assume
1271              * a cert is allowed to be a CA if it specifies the
1272              * anyExtendedKeyUsage usage oid.  See again RFC 5280, section
1273              * 4.2.1.12: "Applications that require the presence of a
1274              * particular purpose MAY reject certificates that include the
1275              * anyExtendedKeyUsage OID but not the particular OID expected for
1276              * the application."
1277              */
1278             ret = FALSE;
1279             for (i = 0; !ret && i < usage->cUsageIdentifier; i++)
1280                 if (!strcmp(usage->rgpszUsageIdentifier[i],
1281                  szOID_PKIX_KP_CODE_SIGNING))
1282                     ret = TRUE;
1283             LocalFree(usage);
1284         }
1285     }
1286     else
1287         ret = TRUE;
1288     return ret;
1289 }
1290
1291 static BOOL CRYPT_CriticalExtensionsSupported(PCCERT_CONTEXT cert)
1292 {
1293     BOOL ret = TRUE;
1294     DWORD i;
1295
1296     for (i = 0; ret && i < cert->pCertInfo->cExtension; i++)
1297     {
1298         if (cert->pCertInfo->rgExtension[i].fCritical)
1299         {
1300             LPCSTR oid = cert->pCertInfo->rgExtension[i].pszObjId;
1301
1302             if (!strcmp(oid, szOID_BASIC_CONSTRAINTS))
1303                 ret = TRUE;
1304             else if (!strcmp(oid, szOID_BASIC_CONSTRAINTS2))
1305                 ret = TRUE;
1306             else if (!strcmp(oid, szOID_NAME_CONSTRAINTS))
1307                 ret = TRUE;
1308             else if (!strcmp(oid, szOID_KEY_USAGE))
1309                 ret = TRUE;
1310             else if (!strcmp(oid, szOID_SUBJECT_ALT_NAME))
1311                 ret = TRUE;
1312             else if (!strcmp(oid, szOID_SUBJECT_ALT_NAME2))
1313                 ret = TRUE;
1314             else if (!strcmp(oid, szOID_ENHANCED_KEY_USAGE))
1315                 ret = TRUE;
1316             else
1317             {
1318                 FIXME("unsupported critical extension %s\n",
1319                  debugstr_a(oid));
1320                 ret = FALSE;
1321             }
1322         }
1323     }
1324     return ret;
1325 }
1326
1327 static BOOL CRYPT_IsCertVersionValid(PCCERT_CONTEXT cert)
1328 {
1329     BOOL ret = TRUE;
1330
1331     /* Checks whether the contents of the cert match the cert's version. */
1332     switch (cert->pCertInfo->dwVersion)
1333     {
1334     case CERT_V1:
1335         /* A V1 cert may not contain unique identifiers.  See RFC 5280,
1336          * section 4.1.2.8:
1337          * "These fields MUST only appear if the version is 2 or 3 (Section
1338          *  4.1.2.1).  These fields MUST NOT appear if the version is 1."
1339          */
1340         if (cert->pCertInfo->IssuerUniqueId.cbData ||
1341          cert->pCertInfo->SubjectUniqueId.cbData)
1342             ret = FALSE;
1343         /* A V1 cert may not contain extensions.  See RFC 5280, section 4.1.2.9:
1344          * "This field MUST only appear if the version is 3 (Section 4.1.2.1)."
1345          */
1346         if (cert->pCertInfo->cExtension)
1347             ret = FALSE;
1348         break;
1349     case CERT_V2:
1350         /* A V2 cert may not contain extensions.  See RFC 5280, section 4.1.2.9:
1351          * "This field MUST only appear if the version is 3 (Section 4.1.2.1)."
1352          */
1353         if (cert->pCertInfo->cExtension)
1354             ret = FALSE;
1355         break;
1356     case CERT_V3:
1357         /* Do nothing, all fields are allowed for V3 certs */
1358         break;
1359     default:
1360         WARN_(chain)("invalid cert version %d\n", cert->pCertInfo->dwVersion);
1361         ret = FALSE;
1362     }
1363     return ret;
1364 }
1365
1366 static void CRYPT_CheckSimpleChain(PCertificateChainEngine engine,
1367  PCERT_SIMPLE_CHAIN chain, LPFILETIME time)
1368 {
1369     PCERT_CHAIN_ELEMENT rootElement = chain->rgpElement[chain->cElement - 1];
1370     int i;
1371     BOOL pathLengthConstraintViolated = FALSE;
1372     CERT_BASIC_CONSTRAINTS2_INFO constraints = { FALSE, FALSE, 0 };
1373
1374     TRACE_(chain)("checking chain with %d elements for time %s\n",
1375      chain->cElement, debugstr_w(filetime_to_str(time)));
1376     for (i = chain->cElement - 1; i >= 0; i--)
1377     {
1378         BOOL isRoot;
1379
1380         if (TRACE_ON(chain))
1381             dump_element(chain->rgpElement[i]->pCertContext);
1382         if (i == chain->cElement - 1)
1383             isRoot = CRYPT_IsCertificateSelfSigned(
1384              chain->rgpElement[i]->pCertContext);
1385         else
1386             isRoot = FALSE;
1387         if (!CRYPT_IsCertVersionValid(chain->rgpElement[i]->pCertContext))
1388         {
1389             /* MS appears to accept certs whose versions don't match their
1390              * contents, so there isn't an appropriate error code.
1391              */
1392             chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
1393              CERT_TRUST_INVALID_EXTENSION;
1394         }
1395         if (CertVerifyTimeValidity(time,
1396          chain->rgpElement[i]->pCertContext->pCertInfo) != 0)
1397             chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
1398              CERT_TRUST_IS_NOT_TIME_VALID;
1399         if (i != 0)
1400         {
1401             /* Check the signature of the cert this issued */
1402             if (!CryptVerifyCertificateSignatureEx(0, X509_ASN_ENCODING,
1403              CRYPT_VERIFY_CERT_SIGN_SUBJECT_CERT,
1404              (void *)chain->rgpElement[i - 1]->pCertContext,
1405              CRYPT_VERIFY_CERT_SIGN_ISSUER_CERT,
1406              (void *)chain->rgpElement[i]->pCertContext, 0, NULL))
1407                 chain->rgpElement[i - 1]->TrustStatus.dwErrorStatus |=
1408                  CERT_TRUST_IS_NOT_SIGNATURE_VALID;
1409             /* Once a path length constraint has been violated, every remaining
1410              * CA cert's basic constraints is considered invalid.
1411              */
1412             if (pathLengthConstraintViolated)
1413                 chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
1414                  CERT_TRUST_INVALID_BASIC_CONSTRAINTS;
1415             else if (!CRYPT_CheckBasicConstraintsForCA(engine,
1416              chain->rgpElement[i]->pCertContext, &constraints, i - 1, isRoot,
1417              &pathLengthConstraintViolated))
1418                 chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
1419                  CERT_TRUST_INVALID_BASIC_CONSTRAINTS;
1420             else if (constraints.fPathLenConstraint &&
1421              constraints.dwPathLenConstraint)
1422             {
1423                 /* This one's valid - decrement max length */
1424                 constraints.dwPathLenConstraint--;
1425             }
1426         }
1427         else
1428         {
1429             /* Check whether end cert has a basic constraints extension */
1430             if (!CRYPT_DecodeBasicConstraints(
1431              chain->rgpElement[i]->pCertContext, &constraints, FALSE))
1432                 chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
1433                  CERT_TRUST_INVALID_BASIC_CONSTRAINTS;
1434         }
1435         if (!CRYPT_KeyUsageValid(engine, chain->rgpElement[i]->pCertContext,
1436          isRoot, constraints.fCA, i))
1437             chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
1438              CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
1439         if (i != 0)
1440             if (!CRYPT_ExtendedKeyUsageValidForCA(
1441              chain->rgpElement[i]->pCertContext))
1442                 chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
1443                  CERT_TRUST_IS_NOT_VALID_FOR_USAGE;
1444         if (CRYPT_IsSimpleChainCyclic(chain))
1445         {
1446             /* If the chain is cyclic, then the path length constraints
1447              * are violated, because the chain is infinitely long.
1448              */
1449             pathLengthConstraintViolated = TRUE;
1450             chain->TrustStatus.dwErrorStatus |=
1451              CERT_TRUST_IS_PARTIAL_CHAIN |
1452              CERT_TRUST_INVALID_BASIC_CONSTRAINTS;
1453         }
1454         /* Check whether every critical extension is supported */
1455         if (!CRYPT_CriticalExtensionsSupported(
1456          chain->rgpElement[i]->pCertContext))
1457             chain->rgpElement[i]->TrustStatus.dwErrorStatus |=
1458              CERT_TRUST_INVALID_EXTENSION;
1459         CRYPT_CombineTrustStatus(&chain->TrustStatus,
1460          &chain->rgpElement[i]->TrustStatus);
1461     }
1462     CRYPT_CheckChainNameConstraints(chain);
1463     if (CRYPT_IsCertificateSelfSigned(rootElement->pCertContext))
1464     {
1465         rootElement->TrustStatus.dwInfoStatus |=
1466          CERT_TRUST_IS_SELF_SIGNED | CERT_TRUST_HAS_NAME_MATCH_ISSUER;
1467         CRYPT_CheckRootCert(engine->hRoot, rootElement);
1468     }
1469     CRYPT_CombineTrustStatus(&chain->TrustStatus, &rootElement->TrustStatus);
1470 }
1471
1472 static PCCERT_CONTEXT CRYPT_GetIssuer(HCERTSTORE store, PCCERT_CONTEXT subject,
1473  PCCERT_CONTEXT prevIssuer, DWORD *infoStatus)
1474 {
1475     PCCERT_CONTEXT issuer = NULL;
1476     PCERT_EXTENSION ext;
1477     DWORD size;
1478
1479     *infoStatus = 0;
1480     if ((ext = CertFindExtension(szOID_AUTHORITY_KEY_IDENTIFIER,
1481      subject->pCertInfo->cExtension, subject->pCertInfo->rgExtension)))
1482     {
1483         CERT_AUTHORITY_KEY_ID_INFO *info;
1484         BOOL ret;
1485
1486         ret = CryptDecodeObjectEx(subject->dwCertEncodingType,
1487          X509_AUTHORITY_KEY_ID, ext->Value.pbData, ext->Value.cbData,
1488          CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL,
1489          &info, &size);
1490         if (ret)
1491         {
1492             CERT_ID id;
1493
1494             if (info->CertIssuer.cbData && info->CertSerialNumber.cbData)
1495             {
1496                 id.dwIdChoice = CERT_ID_ISSUER_SERIAL_NUMBER;
1497                 memcpy(&id.u.IssuerSerialNumber.Issuer, &info->CertIssuer,
1498                  sizeof(CERT_NAME_BLOB));
1499                 memcpy(&id.u.IssuerSerialNumber.SerialNumber,
1500                  &info->CertSerialNumber, sizeof(CRYPT_INTEGER_BLOB));
1501                 issuer = CertFindCertificateInStore(store,
1502                  subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
1503                  prevIssuer);
1504                 if (issuer)
1505                     *infoStatus = CERT_TRUST_HAS_EXACT_MATCH_ISSUER;
1506             }
1507             else if (info->KeyId.cbData)
1508             {
1509                 id.dwIdChoice = CERT_ID_KEY_IDENTIFIER;
1510                 memcpy(&id.u.KeyId, &info->KeyId, sizeof(CRYPT_HASH_BLOB));
1511                 issuer = CertFindCertificateInStore(store,
1512                  subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
1513                  prevIssuer);
1514                 if (issuer)
1515                     *infoStatus = CERT_TRUST_HAS_KEY_MATCH_ISSUER;
1516             }
1517             LocalFree(info);
1518         }
1519     }
1520     else if ((ext = CertFindExtension(szOID_AUTHORITY_KEY_IDENTIFIER2,
1521      subject->pCertInfo->cExtension, subject->pCertInfo->rgExtension)))
1522     {
1523         CERT_AUTHORITY_KEY_ID2_INFO *info;
1524         BOOL ret;
1525
1526         ret = CryptDecodeObjectEx(subject->dwCertEncodingType,
1527          X509_AUTHORITY_KEY_ID2, ext->Value.pbData, ext->Value.cbData,
1528          CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL,
1529          &info, &size);
1530         if (ret)
1531         {
1532             CERT_ID id;
1533
1534             if (info->AuthorityCertIssuer.cAltEntry &&
1535              info->AuthorityCertSerialNumber.cbData)
1536             {
1537                 PCERT_ALT_NAME_ENTRY directoryName = NULL;
1538                 DWORD i;
1539
1540                 for (i = 0; !directoryName &&
1541                  i < info->AuthorityCertIssuer.cAltEntry; i++)
1542                     if (info->AuthorityCertIssuer.rgAltEntry[i].dwAltNameChoice
1543                      == CERT_ALT_NAME_DIRECTORY_NAME)
1544                         directoryName =
1545                          &info->AuthorityCertIssuer.rgAltEntry[i];
1546                 if (directoryName)
1547                 {
1548                     id.dwIdChoice = CERT_ID_ISSUER_SERIAL_NUMBER;
1549                     memcpy(&id.u.IssuerSerialNumber.Issuer,
1550                      &directoryName->u.DirectoryName, sizeof(CERT_NAME_BLOB));
1551                     memcpy(&id.u.IssuerSerialNumber.SerialNumber,
1552                      &info->AuthorityCertSerialNumber,
1553                      sizeof(CRYPT_INTEGER_BLOB));
1554                     issuer = CertFindCertificateInStore(store,
1555                      subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
1556                      prevIssuer);
1557                     if (issuer)
1558                         *infoStatus = CERT_TRUST_HAS_EXACT_MATCH_ISSUER;
1559                 }
1560                 else
1561                     FIXME("no supported name type in authority key id2\n");
1562             }
1563             else if (info->KeyId.cbData)
1564             {
1565                 id.dwIdChoice = CERT_ID_KEY_IDENTIFIER;
1566                 memcpy(&id.u.KeyId, &info->KeyId, sizeof(CRYPT_HASH_BLOB));
1567                 issuer = CertFindCertificateInStore(store,
1568                  subject->dwCertEncodingType, 0, CERT_FIND_CERT_ID, &id,
1569                  prevIssuer);
1570                 if (issuer)
1571                     *infoStatus = CERT_TRUST_HAS_KEY_MATCH_ISSUER;
1572             }
1573             LocalFree(info);
1574         }
1575     }
1576     else
1577     {
1578         issuer = CertFindCertificateInStore(store,
1579          subject->dwCertEncodingType, 0, CERT_FIND_SUBJECT_NAME,
1580          &subject->pCertInfo->Issuer, prevIssuer);
1581         *infoStatus = CERT_TRUST_HAS_NAME_MATCH_ISSUER;
1582     }
1583     return issuer;
1584 }
1585
1586 /* Builds a simple chain by finding an issuer for the last cert in the chain,
1587  * until reaching a self-signed cert, or until no issuer can be found.
1588  */
1589 static BOOL CRYPT_BuildSimpleChain(const CertificateChainEngine *engine,
1590  HCERTSTORE world, PCERT_SIMPLE_CHAIN chain)
1591 {
1592     BOOL ret = TRUE;
1593     PCCERT_CONTEXT cert = chain->rgpElement[chain->cElement - 1]->pCertContext;
1594
1595     while (ret && !CRYPT_IsSimpleChainCyclic(chain) &&
1596      !CRYPT_IsCertificateSelfSigned(cert))
1597     {
1598         PCCERT_CONTEXT issuer = CRYPT_GetIssuer(world, cert, NULL,
1599          &chain->rgpElement[chain->cElement - 1]->TrustStatus.dwInfoStatus);
1600
1601         if (issuer)
1602         {
1603             ret = CRYPT_AddCertToSimpleChain(engine, chain, issuer,
1604              chain->rgpElement[chain->cElement - 1]->TrustStatus.dwInfoStatus);
1605             /* CRYPT_AddCertToSimpleChain add-ref's the issuer, so free it to
1606              * close the enumeration that found it
1607              */
1608             CertFreeCertificateContext(issuer);
1609             cert = issuer;
1610         }
1611         else
1612         {
1613             TRACE_(chain)("Couldn't find issuer, halting chain creation\n");
1614             chain->TrustStatus.dwErrorStatus |= CERT_TRUST_IS_PARTIAL_CHAIN;
1615             break;
1616         }
1617     }
1618     return ret;
1619 }
1620
1621 static BOOL CRYPT_GetSimpleChainForCert(PCertificateChainEngine engine,
1622  HCERTSTORE world, PCCERT_CONTEXT cert, LPFILETIME pTime,
1623  PCERT_SIMPLE_CHAIN *ppChain)
1624 {
1625     BOOL ret = FALSE;
1626     PCERT_SIMPLE_CHAIN chain;
1627
1628     TRACE("(%p, %p, %p, %p)\n", engine, world, cert, pTime);
1629
1630     chain = CryptMemAlloc(sizeof(CERT_SIMPLE_CHAIN));
1631     if (chain)
1632     {
1633         memset(chain, 0, sizeof(CERT_SIMPLE_CHAIN));
1634         chain->cbSize = sizeof(CERT_SIMPLE_CHAIN);
1635         ret = CRYPT_AddCertToSimpleChain(engine, chain, cert, 0);
1636         if (ret)
1637         {
1638             ret = CRYPT_BuildSimpleChain(engine, world, chain);
1639             if (ret)
1640                 CRYPT_CheckSimpleChain(engine, chain, pTime);
1641         }
1642         if (!ret)
1643         {
1644             CRYPT_FreeSimpleChain(chain);
1645             chain = NULL;
1646         }
1647         *ppChain = chain;
1648     }
1649     return ret;
1650 }
1651
1652 static BOOL CRYPT_BuildCandidateChainFromCert(HCERTCHAINENGINE hChainEngine,
1653  PCCERT_CONTEXT cert, LPFILETIME pTime, HCERTSTORE hAdditionalStore,
1654  PCertificateChain *ppChain)
1655 {
1656     PCertificateChainEngine engine = (PCertificateChainEngine)hChainEngine;
1657     PCERT_SIMPLE_CHAIN simpleChain = NULL;
1658     HCERTSTORE world;
1659     BOOL ret;
1660
1661     world = CertOpenStore(CERT_STORE_PROV_COLLECTION, 0, 0,
1662      CERT_STORE_CREATE_NEW_FLAG, NULL);
1663     CertAddStoreToCollection(world, engine->hWorld, 0, 0);
1664     if (hAdditionalStore)
1665         CertAddStoreToCollection(world, hAdditionalStore, 0, 0);
1666     /* FIXME: only simple chains are supported for now, as CTLs aren't
1667      * supported yet.
1668      */
1669     if ((ret = CRYPT_GetSimpleChainForCert(engine, world, cert, pTime,
1670      &simpleChain)))
1671     {
1672         PCertificateChain chain = CryptMemAlloc(sizeof(CertificateChain));
1673
1674         if (chain)
1675         {
1676             chain->ref = 1;
1677             chain->world = world;
1678             chain->context.cbSize = sizeof(CERT_CHAIN_CONTEXT);
1679             chain->context.TrustStatus = simpleChain->TrustStatus;
1680             chain->context.cChain = 1;
1681             chain->context.rgpChain = CryptMemAlloc(sizeof(PCERT_SIMPLE_CHAIN));
1682             chain->context.rgpChain[0] = simpleChain;
1683             chain->context.cLowerQualityChainContext = 0;
1684             chain->context.rgpLowerQualityChainContext = NULL;
1685             chain->context.fHasRevocationFreshnessTime = FALSE;
1686             chain->context.dwRevocationFreshnessTime = 0;
1687         }
1688         else
1689             ret = FALSE;
1690         *ppChain = chain;
1691     }
1692     return ret;
1693 }
1694
1695 /* Makes and returns a copy of chain, up to and including element iElement. */
1696 static PCERT_SIMPLE_CHAIN CRYPT_CopySimpleChainToElement(
1697  const CERT_SIMPLE_CHAIN *chain, DWORD iElement)
1698 {
1699     PCERT_SIMPLE_CHAIN copy = CryptMemAlloc(sizeof(CERT_SIMPLE_CHAIN));
1700
1701     if (copy)
1702     {
1703         memset(copy, 0, sizeof(CERT_SIMPLE_CHAIN));
1704         copy->cbSize = sizeof(CERT_SIMPLE_CHAIN);
1705         copy->rgpElement =
1706          CryptMemAlloc((iElement + 1) * sizeof(PCERT_CHAIN_ELEMENT));
1707         if (copy->rgpElement)
1708         {
1709             DWORD i;
1710             BOOL ret = TRUE;
1711
1712             memset(copy->rgpElement, 0,
1713              (iElement + 1) * sizeof(PCERT_CHAIN_ELEMENT));
1714             for (i = 0; ret && i <= iElement; i++)
1715             {
1716                 PCERT_CHAIN_ELEMENT element =
1717                  CryptMemAlloc(sizeof(CERT_CHAIN_ELEMENT));
1718
1719                 if (element)
1720                 {
1721                     *element = *chain->rgpElement[i];
1722                     element->pCertContext = CertDuplicateCertificateContext(
1723                      chain->rgpElement[i]->pCertContext);
1724                     /* Reset the trust status of the copied element, it'll get
1725                      * rechecked after the new chain is done.
1726                      */
1727                     memset(&element->TrustStatus, 0, sizeof(CERT_TRUST_STATUS));
1728                     copy->rgpElement[copy->cElement++] = element;
1729                 }
1730                 else
1731                     ret = FALSE;
1732             }
1733             if (!ret)
1734             {
1735                 for (i = 0; i <= iElement; i++)
1736                     CryptMemFree(copy->rgpElement[i]);
1737                 CryptMemFree(copy->rgpElement);
1738                 CryptMemFree(copy);
1739                 copy = NULL;
1740             }
1741         }
1742         else
1743         {
1744             CryptMemFree(copy);
1745             copy = NULL;
1746         }
1747     }
1748     return copy;
1749 }
1750
1751 static void CRYPT_FreeLowerQualityChains(PCertificateChain chain)
1752 {
1753     DWORD i;
1754
1755     for (i = 0; i < chain->context.cLowerQualityChainContext; i++)
1756         CertFreeCertificateChain(chain->context.rgpLowerQualityChainContext[i]);
1757     CryptMemFree(chain->context.rgpLowerQualityChainContext);
1758     chain->context.cLowerQualityChainContext = 0;
1759     chain->context.rgpLowerQualityChainContext = NULL;
1760 }
1761
1762 static void CRYPT_FreeChainContext(PCertificateChain chain)
1763 {
1764     DWORD i;
1765
1766     CRYPT_FreeLowerQualityChains(chain);
1767     for (i = 0; i < chain->context.cChain; i++)
1768         CRYPT_FreeSimpleChain(chain->context.rgpChain[i]);
1769     CryptMemFree(chain->context.rgpChain);
1770     CertCloseStore(chain->world, 0);
1771     CryptMemFree(chain);
1772 }
1773
1774 /* Makes and returns a copy of chain, up to and including element iElement of
1775  * simple chain iChain.
1776  */
1777 static PCertificateChain CRYPT_CopyChainToElement(PCertificateChain chain,
1778  DWORD iChain, DWORD iElement)
1779 {
1780     PCertificateChain copy = CryptMemAlloc(sizeof(CertificateChain));
1781
1782     if (copy)
1783     {
1784         copy->ref = 1;
1785         copy->world = CertDuplicateStore(chain->world);
1786         copy->context.cbSize = sizeof(CERT_CHAIN_CONTEXT);
1787         /* Leave the trust status of the copied chain unset, it'll get
1788          * rechecked after the new chain is done.
1789          */
1790         memset(&copy->context.TrustStatus, 0, sizeof(CERT_TRUST_STATUS));
1791         copy->context.cLowerQualityChainContext = 0;
1792         copy->context.rgpLowerQualityChainContext = NULL;
1793         copy->context.fHasRevocationFreshnessTime = FALSE;
1794         copy->context.dwRevocationFreshnessTime = 0;
1795         copy->context.rgpChain = CryptMemAlloc(
1796          (iChain + 1) * sizeof(PCERT_SIMPLE_CHAIN));
1797         if (copy->context.rgpChain)
1798         {
1799             BOOL ret = TRUE;
1800             DWORD i;
1801
1802             memset(copy->context.rgpChain, 0,
1803              (iChain + 1) * sizeof(PCERT_SIMPLE_CHAIN));
1804             if (iChain)
1805             {
1806                 for (i = 0; ret && iChain && i < iChain - 1; i++)
1807                 {
1808                     copy->context.rgpChain[i] =
1809                      CRYPT_CopySimpleChainToElement(chain->context.rgpChain[i],
1810                      chain->context.rgpChain[i]->cElement - 1);
1811                     if (!copy->context.rgpChain[i])
1812                         ret = FALSE;
1813                 }
1814             }
1815             else
1816                 i = 0;
1817             if (ret)
1818             {
1819                 copy->context.rgpChain[i] =
1820                  CRYPT_CopySimpleChainToElement(chain->context.rgpChain[i],
1821                  iElement);
1822                 if (!copy->context.rgpChain[i])
1823                     ret = FALSE;
1824             }
1825             if (!ret)
1826             {
1827                 CRYPT_FreeChainContext(copy);
1828                 copy = NULL;
1829             }
1830             else
1831                 copy->context.cChain = iChain + 1;
1832         }
1833         else
1834         {
1835             CryptMemFree(copy);
1836             copy = NULL;
1837         }
1838     }
1839     return copy;
1840 }
1841
1842 static PCertificateChain CRYPT_BuildAlternateContextFromChain(
1843  HCERTCHAINENGINE hChainEngine, LPFILETIME pTime, HCERTSTORE hAdditionalStore,
1844  PCertificateChain chain)
1845 {
1846     PCertificateChainEngine engine = (PCertificateChainEngine)hChainEngine;
1847     PCertificateChain alternate;
1848
1849     TRACE("(%p, %p, %p, %p)\n", hChainEngine, pTime, hAdditionalStore, chain);
1850
1851     /* Always start with the last "lower quality" chain to ensure a consistent
1852      * order of alternate creation:
1853      */
1854     if (chain->context.cLowerQualityChainContext)
1855         chain = (PCertificateChain)chain->context.rgpLowerQualityChainContext[
1856          chain->context.cLowerQualityChainContext - 1];
1857     /* A chain with only one element can't have any alternates */
1858     if (chain->context.cChain <= 1 && chain->context.rgpChain[0]->cElement <= 1)
1859         alternate = NULL;
1860     else
1861     {
1862         DWORD i, j, infoStatus;
1863         PCCERT_CONTEXT alternateIssuer = NULL;
1864
1865         alternate = NULL;
1866         for (i = 0; !alternateIssuer && i < chain->context.cChain; i++)
1867             for (j = 0; !alternateIssuer &&
1868              j < chain->context.rgpChain[i]->cElement - 1; j++)
1869             {
1870                 PCCERT_CONTEXT subject =
1871                  chain->context.rgpChain[i]->rgpElement[j]->pCertContext;
1872                 PCCERT_CONTEXT prevIssuer = CertDuplicateCertificateContext(
1873                  chain->context.rgpChain[i]->rgpElement[j + 1]->pCertContext);
1874
1875                 alternateIssuer = CRYPT_GetIssuer(prevIssuer->hCertStore,
1876                  subject, prevIssuer, &infoStatus);
1877             }
1878         if (alternateIssuer)
1879         {
1880             i--;
1881             j--;
1882             alternate = CRYPT_CopyChainToElement(chain, i, j);
1883             if (alternate)
1884             {
1885                 BOOL ret = CRYPT_AddCertToSimpleChain(engine,
1886                  alternate->context.rgpChain[i], alternateIssuer, infoStatus);
1887
1888                 /* CRYPT_AddCertToSimpleChain add-ref's the issuer, so free it
1889                  * to close the enumeration that found it
1890                  */
1891                 CertFreeCertificateContext(alternateIssuer);
1892                 if (ret)
1893                 {
1894                     ret = CRYPT_BuildSimpleChain(engine, alternate->world,
1895                      alternate->context.rgpChain[i]);
1896                     if (ret)
1897                         CRYPT_CheckSimpleChain(engine,
1898                          alternate->context.rgpChain[i], pTime);
1899                     CRYPT_CombineTrustStatus(&alternate->context.TrustStatus,
1900                      &alternate->context.rgpChain[i]->TrustStatus);
1901                 }
1902                 if (!ret)
1903                 {
1904                     CRYPT_FreeChainContext(alternate);
1905                     alternate = NULL;
1906                 }
1907             }
1908         }
1909     }
1910     TRACE("%p\n", alternate);
1911     return alternate;
1912 }
1913
1914 #define CHAIN_QUALITY_SIGNATURE_VALID   0x16
1915 #define CHAIN_QUALITY_TIME_VALID        8
1916 #define CHAIN_QUALITY_COMPLETE_CHAIN    4
1917 #define CHAIN_QUALITY_BASIC_CONSTRAINTS 2
1918 #define CHAIN_QUALITY_TRUSTED_ROOT      1
1919
1920 #define CHAIN_QUALITY_HIGHEST \
1921  CHAIN_QUALITY_SIGNATURE_VALID | CHAIN_QUALITY_TIME_VALID | \
1922  CHAIN_QUALITY_COMPLETE_CHAIN | CHAIN_QUALITY_BASIC_CONSTRAINTS | \
1923  CHAIN_QUALITY_TRUSTED_ROOT
1924
1925 #define IS_TRUST_ERROR_SET(TrustStatus, bits) \
1926  (TrustStatus)->dwErrorStatus & (bits)
1927
1928 static DWORD CRYPT_ChainQuality(const CertificateChain *chain)
1929 {
1930     DWORD quality = CHAIN_QUALITY_HIGHEST;
1931
1932     if (IS_TRUST_ERROR_SET(&chain->context.TrustStatus,
1933      CERT_TRUST_IS_UNTRUSTED_ROOT))
1934         quality &= ~CHAIN_QUALITY_TRUSTED_ROOT;
1935     if (IS_TRUST_ERROR_SET(&chain->context.TrustStatus,
1936      CERT_TRUST_INVALID_BASIC_CONSTRAINTS))
1937         quality &= ~CHAIN_QUALITY_BASIC_CONSTRAINTS;
1938     if (IS_TRUST_ERROR_SET(&chain->context.TrustStatus,
1939      CERT_TRUST_IS_PARTIAL_CHAIN))
1940         quality &= ~CHAIN_QUALITY_COMPLETE_CHAIN;
1941     if (IS_TRUST_ERROR_SET(&chain->context.TrustStatus,
1942      CERT_TRUST_IS_NOT_TIME_VALID | CERT_TRUST_IS_NOT_TIME_NESTED))
1943         quality &= ~CHAIN_QUALITY_TIME_VALID;
1944     if (IS_TRUST_ERROR_SET(&chain->context.TrustStatus,
1945      CERT_TRUST_IS_NOT_SIGNATURE_VALID))
1946         quality &= ~CHAIN_QUALITY_SIGNATURE_VALID;
1947     return quality;
1948 }
1949
1950 /* Chooses the highest quality chain among chain and its "lower quality"
1951  * alternate chains.  Returns the highest quality chain, with all other
1952  * chains as lower quality chains of it.
1953  */
1954 static PCertificateChain CRYPT_ChooseHighestQualityChain(
1955  PCertificateChain chain)
1956 {
1957     DWORD i;
1958
1959     /* There are always only two chains being considered:  chain, and an
1960      * alternate at chain->rgpLowerQualityChainContext[i].  If the alternate
1961      * has a higher quality than chain, the alternate gets assigned the lower
1962      * quality contexts, with chain taking the alternate's place among the
1963      * lower quality contexts.
1964      */
1965     for (i = 0; i < chain->context.cLowerQualityChainContext; i++)
1966     {
1967         PCertificateChain alternate =
1968          (PCertificateChain)chain->context.rgpLowerQualityChainContext[i];
1969
1970         if (CRYPT_ChainQuality(alternate) > CRYPT_ChainQuality(chain))
1971         {
1972             alternate->context.cLowerQualityChainContext =
1973              chain->context.cLowerQualityChainContext;
1974             alternate->context.rgpLowerQualityChainContext =
1975              chain->context.rgpLowerQualityChainContext;
1976             alternate->context.rgpLowerQualityChainContext[i] =
1977              (PCCERT_CHAIN_CONTEXT)chain;
1978             chain->context.cLowerQualityChainContext = 0;
1979             chain->context.rgpLowerQualityChainContext = NULL;
1980             chain = alternate;
1981         }
1982     }
1983     return chain;
1984 }
1985
1986 static BOOL CRYPT_AddAlternateChainToChain(PCertificateChain chain,
1987  const CertificateChain *alternate)
1988 {
1989     BOOL ret;
1990
1991     if (chain->context.cLowerQualityChainContext)
1992         chain->context.rgpLowerQualityChainContext =
1993          CryptMemRealloc(chain->context.rgpLowerQualityChainContext,
1994          (chain->context.cLowerQualityChainContext + 1) *
1995          sizeof(PCCERT_CHAIN_CONTEXT));
1996     else
1997         chain->context.rgpLowerQualityChainContext =
1998          CryptMemAlloc(sizeof(PCCERT_CHAIN_CONTEXT));
1999     if (chain->context.rgpLowerQualityChainContext)
2000     {
2001         chain->context.rgpLowerQualityChainContext[
2002          chain->context.cLowerQualityChainContext++] =
2003          (PCCERT_CHAIN_CONTEXT)alternate;
2004         ret = TRUE;
2005     }
2006     else
2007         ret = FALSE;
2008     return ret;
2009 }
2010
2011 static PCERT_CHAIN_ELEMENT CRYPT_FindIthElementInChain(
2012  const CERT_CHAIN_CONTEXT *chain, DWORD i)
2013 {
2014     DWORD j, iElement;
2015     PCERT_CHAIN_ELEMENT element = NULL;
2016
2017     for (j = 0, iElement = 0; !element && j < chain->cChain; j++)
2018     {
2019         if (iElement + chain->rgpChain[j]->cElement < i)
2020             iElement += chain->rgpChain[j]->cElement;
2021         else
2022             element = chain->rgpChain[j]->rgpElement[i - iElement];
2023     }
2024     return element;
2025 }
2026
2027 typedef struct _CERT_CHAIN_PARA_NO_EXTRA_FIELDS {
2028     DWORD            cbSize;
2029     CERT_USAGE_MATCH RequestedUsage;
2030 } CERT_CHAIN_PARA_NO_EXTRA_FIELDS, *PCERT_CHAIN_PARA_NO_EXTRA_FIELDS;
2031
2032 static void CRYPT_VerifyChainRevocation(PCERT_CHAIN_CONTEXT chain,
2033  LPFILETIME pTime, const CERT_CHAIN_PARA *pChainPara, DWORD chainFlags)
2034 {
2035     DWORD cContext;
2036
2037     if (chainFlags & CERT_CHAIN_REVOCATION_CHECK_END_CERT)
2038         cContext = 1;
2039     else if ((chainFlags & CERT_CHAIN_REVOCATION_CHECK_CHAIN) ||
2040      (chainFlags & CERT_CHAIN_REVOCATION_CHECK_CHAIN_EXCLUDE_ROOT))
2041     {
2042         DWORD i;
2043
2044         for (i = 0, cContext = 0; i < chain->cChain; i++)
2045         {
2046             if (i < chain->cChain - 1 ||
2047              chainFlags & CERT_CHAIN_REVOCATION_CHECK_CHAIN)
2048                 cContext += chain->rgpChain[i]->cElement;
2049             else
2050                 cContext += chain->rgpChain[i]->cElement - 1;
2051         }
2052     }
2053     else
2054         cContext = 0;
2055     if (cContext)
2056     {
2057         PCCERT_CONTEXT *contexts =
2058          CryptMemAlloc(cContext * sizeof(PCCERT_CONTEXT *));
2059
2060         if (contexts)
2061         {
2062             DWORD i, j, iContext, revocationFlags;
2063             CERT_REVOCATION_PARA revocationPara = { sizeof(revocationPara), 0 };
2064             CERT_REVOCATION_STATUS revocationStatus =
2065              { sizeof(revocationStatus), 0 };
2066             BOOL ret;
2067
2068             for (i = 0, iContext = 0; iContext < cContext && i < chain->cChain;
2069              i++)
2070             {
2071                 for (j = 0; iContext < cContext &&
2072                  j < chain->rgpChain[i]->cElement; j++)
2073                     contexts[iContext++] =
2074                      chain->rgpChain[i]->rgpElement[j]->pCertContext;
2075             }
2076             revocationFlags = CERT_VERIFY_REV_CHAIN_FLAG;
2077             if (chainFlags & CERT_CHAIN_REVOCATION_CHECK_CACHE_ONLY)
2078                 revocationFlags |= CERT_VERIFY_CACHE_ONLY_BASED_REVOCATION;
2079             if (chainFlags & CERT_CHAIN_REVOCATION_ACCUMULATIVE_TIMEOUT)
2080                 revocationFlags |= CERT_VERIFY_REV_ACCUMULATIVE_TIMEOUT_FLAG;
2081             revocationPara.pftTimeToUse = pTime;
2082             if (pChainPara->cbSize == sizeof(CERT_CHAIN_PARA))
2083             {
2084                 revocationPara.dwUrlRetrievalTimeout =
2085                  pChainPara->dwUrlRetrievalTimeout;
2086                 revocationPara.fCheckFreshnessTime =
2087                  pChainPara->fCheckRevocationFreshnessTime;
2088                 revocationPara.dwFreshnessTime =
2089                  pChainPara->dwRevocationFreshnessTime;
2090             }
2091             ret = CertVerifyRevocation(X509_ASN_ENCODING,
2092              CERT_CONTEXT_REVOCATION_TYPE, cContext, (void **)contexts,
2093              revocationFlags, &revocationPara, &revocationStatus);
2094             if (!ret)
2095             {
2096                 PCERT_CHAIN_ELEMENT element =
2097                  CRYPT_FindIthElementInChain(chain, revocationStatus.dwIndex);
2098                 DWORD error;
2099
2100                 switch (revocationStatus.dwError)
2101                 {
2102                 case CRYPT_E_NO_REVOCATION_CHECK:
2103                 case CRYPT_E_NO_REVOCATION_DLL:
2104                 case CRYPT_E_NOT_IN_REVOCATION_DATABASE:
2105                     error = CERT_TRUST_REVOCATION_STATUS_UNKNOWN;
2106                     break;
2107                 case CRYPT_E_REVOCATION_OFFLINE:
2108                     error = CERT_TRUST_IS_OFFLINE_REVOCATION;
2109                     break;
2110                 case CRYPT_E_REVOKED:
2111                     error = CERT_TRUST_IS_REVOKED;
2112                     break;
2113                 default:
2114                     WARN("unmapped error %08x\n", revocationStatus.dwError);
2115                     error = 0;
2116                 }
2117                 if (element)
2118                 {
2119                     /* FIXME: set element's pRevocationInfo member */
2120                     element->TrustStatus.dwErrorStatus |= error;
2121                 }
2122                 chain->TrustStatus.dwErrorStatus |= error;
2123             }
2124             CryptMemFree(contexts);
2125         }
2126     }
2127 }
2128
2129 static void dump_usage_match(LPCSTR name, const CERT_USAGE_MATCH *usageMatch)
2130 {
2131     DWORD i;
2132
2133     TRACE_(chain)("%s: %s\n", name,
2134      usageMatch->dwType == USAGE_MATCH_TYPE_AND ? "AND" : "OR");
2135     for (i = 0; i < usageMatch->Usage.cUsageIdentifier; i++)
2136         TRACE_(chain)("%s\n", usageMatch->Usage.rgpszUsageIdentifier[i]);
2137 }
2138
2139 static void dump_chain_para(const CERT_CHAIN_PARA *pChainPara)
2140 {
2141     TRACE_(chain)("%d\n", pChainPara->cbSize);
2142     if (pChainPara->cbSize >= sizeof(CERT_CHAIN_PARA_NO_EXTRA_FIELDS))
2143         dump_usage_match("RequestedUsage", &pChainPara->RequestedUsage);
2144     if (pChainPara->cbSize >= sizeof(CERT_CHAIN_PARA))
2145     {
2146         dump_usage_match("RequestedIssuancePolicy",
2147          &pChainPara->RequestedIssuancePolicy);
2148         TRACE_(chain)("%d\n", pChainPara->dwUrlRetrievalTimeout);
2149         TRACE_(chain)("%d\n", pChainPara->fCheckRevocationFreshnessTime);
2150         TRACE_(chain)("%d\n", pChainPara->dwRevocationFreshnessTime);
2151     }
2152 }
2153
2154 BOOL WINAPI CertGetCertificateChain(HCERTCHAINENGINE hChainEngine,
2155  PCCERT_CONTEXT pCertContext, LPFILETIME pTime, HCERTSTORE hAdditionalStore,
2156  PCERT_CHAIN_PARA pChainPara, DWORD dwFlags, LPVOID pvReserved,
2157  PCCERT_CHAIN_CONTEXT* ppChainContext)
2158 {
2159     BOOL ret;
2160     PCertificateChain chain = NULL;
2161
2162     TRACE("(%p, %p, %p, %p, %p, %08x, %p, %p)\n", hChainEngine, pCertContext,
2163      pTime, hAdditionalStore, pChainPara, dwFlags, pvReserved, ppChainContext);
2164
2165     if (ppChainContext)
2166         *ppChainContext = NULL;
2167     if (!pChainPara)
2168     {
2169         SetLastError(E_INVALIDARG);
2170         return FALSE;
2171     }
2172     if (!pCertContext->pCertInfo->SignatureAlgorithm.pszObjId)
2173     {
2174         SetLastError(ERROR_INVALID_DATA);
2175         return FALSE;
2176     }
2177
2178     if (!hChainEngine)
2179         hChainEngine = CRYPT_GetDefaultChainEngine();
2180     if (TRACE_ON(chain))
2181         dump_chain_para(pChainPara);
2182     /* FIXME: what about HCCE_LOCAL_MACHINE? */
2183     ret = CRYPT_BuildCandidateChainFromCert(hChainEngine, pCertContext, pTime,
2184      hAdditionalStore, &chain);
2185     if (ret)
2186     {
2187         PCertificateChain alternate = NULL;
2188         PCERT_CHAIN_CONTEXT pChain;
2189
2190         do {
2191             alternate = CRYPT_BuildAlternateContextFromChain(hChainEngine,
2192              pTime, hAdditionalStore, chain);
2193
2194             /* Alternate contexts are added as "lower quality" contexts of
2195              * chain, to avoid loops in alternate chain creation.
2196              * The highest-quality chain is chosen at the end.
2197              */
2198             if (alternate)
2199                 ret = CRYPT_AddAlternateChainToChain(chain, alternate);
2200         } while (ret && alternate);
2201         chain = CRYPT_ChooseHighestQualityChain(chain);
2202         if (!(dwFlags & CERT_CHAIN_RETURN_LOWER_QUALITY_CONTEXTS))
2203             CRYPT_FreeLowerQualityChains(chain);
2204         pChain = (PCERT_CHAIN_CONTEXT)chain;
2205         CRYPT_VerifyChainRevocation(pChain, pTime, pChainPara, dwFlags);
2206         if (ppChainContext)
2207             *ppChainContext = pChain;
2208         else
2209             CertFreeCertificateChain(pChain);
2210     }
2211     TRACE("returning %d\n", ret);
2212     return ret;
2213 }
2214
2215 PCCERT_CHAIN_CONTEXT WINAPI CertDuplicateCertificateChain(
2216  PCCERT_CHAIN_CONTEXT pChainContext)
2217 {
2218     PCertificateChain chain = (PCertificateChain)pChainContext;
2219
2220     TRACE("(%p)\n", pChainContext);
2221
2222     if (chain)
2223         InterlockedIncrement(&chain->ref);
2224     return pChainContext;
2225 }
2226
2227 VOID WINAPI CertFreeCertificateChain(PCCERT_CHAIN_CONTEXT pChainContext)
2228 {
2229     PCertificateChain chain = (PCertificateChain)pChainContext;
2230
2231     TRACE("(%p)\n", pChainContext);
2232
2233     if (chain)
2234     {
2235         if (InterlockedDecrement(&chain->ref) == 0)
2236             CRYPT_FreeChainContext(chain);
2237     }
2238 }
2239
2240 static void find_element_with_error(PCCERT_CHAIN_CONTEXT chain, DWORD error,
2241  LONG *iChain, LONG *iElement)
2242 {
2243     DWORD i, j;
2244
2245     for (i = 0; i < chain->cChain; i++)
2246         for (j = 0; j < chain->rgpChain[i]->cElement; j++)
2247             if (chain->rgpChain[i]->rgpElement[j]->TrustStatus.dwErrorStatus &
2248              error)
2249             {
2250                 *iChain = i;
2251                 *iElement = j;
2252                 return;
2253             }
2254 }
2255
2256 static BOOL WINAPI verify_base_policy(LPCSTR szPolicyOID,
2257  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
2258  PCERT_CHAIN_POLICY_STATUS pPolicyStatus)
2259 {
2260     pPolicyStatus->lChainIndex = pPolicyStatus->lElementIndex = -1;
2261     if (pChainContext->TrustStatus.dwErrorStatus &
2262      CERT_TRUST_IS_NOT_SIGNATURE_VALID)
2263     {
2264         pPolicyStatus->dwError = TRUST_E_CERT_SIGNATURE;
2265         find_element_with_error(pChainContext,
2266          CERT_TRUST_IS_NOT_SIGNATURE_VALID, &pPolicyStatus->lChainIndex,
2267          &pPolicyStatus->lElementIndex);
2268     }
2269     else if (pChainContext->TrustStatus.dwErrorStatus &
2270      CERT_TRUST_IS_UNTRUSTED_ROOT)
2271     {
2272         pPolicyStatus->dwError = CERT_E_UNTRUSTEDROOT;
2273         find_element_with_error(pChainContext,
2274          CERT_TRUST_IS_UNTRUSTED_ROOT, &pPolicyStatus->lChainIndex,
2275          &pPolicyStatus->lElementIndex);
2276     }
2277     else if (pChainContext->TrustStatus.dwErrorStatus & CERT_TRUST_IS_CYCLIC)
2278     {
2279         pPolicyStatus->dwError = CERT_E_CHAINING;
2280         find_element_with_error(pChainContext, CERT_TRUST_IS_CYCLIC,
2281          &pPolicyStatus->lChainIndex, &pPolicyStatus->lElementIndex);
2282         /* For a cyclic chain, which element is a cycle isn't meaningful */
2283         pPolicyStatus->lElementIndex = -1;
2284     }
2285     else
2286         pPolicyStatus->dwError = NO_ERROR;
2287     return TRUE;
2288 }
2289
2290 static BYTE msTestPubKey1[] = {
2291 0x30,0x47,0x02,0x40,0x81,0x55,0x22,0xb9,0x8a,0xa4,0x6f,0xed,0xd6,0xe7,0xd9,
2292 0x66,0x0f,0x55,0xbc,0xd7,0xcd,0xd5,0xbc,0x4e,0x40,0x02,0x21,0xa2,0xb1,0xf7,
2293 0x87,0x30,0x85,0x5e,0xd2,0xf2,0x44,0xb9,0xdc,0x9b,0x75,0xb6,0xfb,0x46,0x5f,
2294 0x42,0xb6,0x9d,0x23,0x36,0x0b,0xde,0x54,0x0f,0xcd,0xbd,0x1f,0x99,0x2a,0x10,
2295 0x58,0x11,0xcb,0x40,0xcb,0xb5,0xa7,0x41,0x02,0x03,0x01,0x00,0x01 };
2296 static BYTE msTestPubKey2[] = {
2297 0x30,0x47,0x02,0x40,0x9c,0x50,0x05,0x1d,0xe2,0x0e,0x4c,0x53,0xd8,0xd9,0xb5,
2298 0xe5,0xfd,0xe9,0xe3,0xad,0x83,0x4b,0x80,0x08,0xd9,0xdc,0xe8,0xe8,0x35,0xf8,
2299 0x11,0xf1,0xe9,0x9b,0x03,0x7a,0x65,0x64,0x76,0x35,0xce,0x38,0x2c,0xf2,0xb6,
2300 0x71,0x9e,0x06,0xd9,0xbf,0xbb,0x31,0x69,0xa3,0xf6,0x30,0xa0,0x78,0x7b,0x18,
2301 0xdd,0x50,0x4d,0x79,0x1e,0xeb,0x61,0xc1,0x02,0x03,0x01,0x00,0x01 };
2302
2303 static BOOL WINAPI verify_authenticode_policy(LPCSTR szPolicyOID,
2304  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
2305  PCERT_CHAIN_POLICY_STATUS pPolicyStatus)
2306 {
2307     BOOL ret = verify_base_policy(szPolicyOID, pChainContext, pPolicyPara,
2308      pPolicyStatus);
2309
2310     if (ret && pPolicyStatus->dwError == CERT_E_UNTRUSTEDROOT)
2311     {
2312         CERT_PUBLIC_KEY_INFO msPubKey = { { 0 } };
2313         BOOL isMSTestRoot = FALSE;
2314         PCCERT_CONTEXT failingCert =
2315          pChainContext->rgpChain[pPolicyStatus->lChainIndex]->
2316          rgpElement[pPolicyStatus->lElementIndex]->pCertContext;
2317         DWORD i;
2318         CRYPT_DATA_BLOB keyBlobs[] = {
2319          { sizeof(msTestPubKey1), msTestPubKey1 },
2320          { sizeof(msTestPubKey2), msTestPubKey2 },
2321         };
2322
2323         /* Check whether the root is an MS test root */
2324         for (i = 0; !isMSTestRoot && i < sizeof(keyBlobs) / sizeof(keyBlobs[0]);
2325          i++)
2326         {
2327             msPubKey.PublicKey.cbData = keyBlobs[i].cbData;
2328             msPubKey.PublicKey.pbData = keyBlobs[i].pbData;
2329             if (CertComparePublicKeyInfo(
2330              X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
2331              &failingCert->pCertInfo->SubjectPublicKeyInfo, &msPubKey))
2332                 isMSTestRoot = TRUE;
2333         }
2334         if (isMSTestRoot)
2335             pPolicyStatus->dwError = CERT_E_UNTRUSTEDTESTROOT;
2336     }
2337     return ret;
2338 }
2339
2340 static BOOL WINAPI verify_basic_constraints_policy(LPCSTR szPolicyOID,
2341  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
2342  PCERT_CHAIN_POLICY_STATUS pPolicyStatus)
2343 {
2344     pPolicyStatus->lChainIndex = pPolicyStatus->lElementIndex = -1;
2345     if (pChainContext->TrustStatus.dwErrorStatus &
2346      CERT_TRUST_INVALID_BASIC_CONSTRAINTS)
2347     {
2348         pPolicyStatus->dwError = TRUST_E_BASIC_CONSTRAINTS;
2349         find_element_with_error(pChainContext,
2350          CERT_TRUST_INVALID_BASIC_CONSTRAINTS, &pPolicyStatus->lChainIndex,
2351          &pPolicyStatus->lElementIndex);
2352     }
2353     else
2354         pPolicyStatus->dwError = NO_ERROR;
2355     return TRUE;
2356 }
2357
2358 static BOOL match_dns_to_subject_alt_name(PCERT_EXTENSION ext,
2359  LPCWSTR server_name)
2360 {
2361     BOOL matches = FALSE;
2362     CERT_ALT_NAME_INFO *subjectName;
2363     DWORD size;
2364
2365     TRACE_(chain)("%s\n", debugstr_w(server_name));
2366     /* FIXME: This can be spoofed by the embedded NULL vulnerability.  The
2367      * returned CERT_ALT_NAME_INFO doesn't have a way to indicate the
2368      * encoded length of a name, so a certificate issued to
2369      * winehq.org\0badsite.com will get treated as having been issued to
2370      * winehq.org.
2371      */
2372     if (CryptDecodeObjectEx(X509_ASN_ENCODING, X509_ALTERNATE_NAME,
2373      ext->Value.pbData, ext->Value.cbData,
2374      CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL,
2375      &subjectName, &size))
2376     {
2377         DWORD i;
2378         BOOL found = FALSE;
2379
2380         for (i = 0; !found && i < subjectName->cAltEntry; i++)
2381         {
2382             if (subjectName->rgAltEntry[i].dwAltNameChoice ==
2383              CERT_ALT_NAME_DNS_NAME)
2384             {
2385                 TRACE_(chain)("dNSName: %s\n", debugstr_w(
2386                  subjectName->rgAltEntry[i].u.pwszDNSName));
2387                 found = TRUE;
2388                 if (!strcmpiW(server_name,
2389                  subjectName->rgAltEntry[i].u.pwszDNSName))
2390                     matches = TRUE;
2391             }
2392         }
2393         LocalFree(subjectName);
2394     }
2395     return matches;
2396 }
2397
2398 static BOOL find_matching_domain_component(CERT_NAME_INFO *name,
2399  LPCWSTR component)
2400 {
2401     BOOL matches = FALSE;
2402     DWORD i, j;
2403
2404     for (i = 0; !matches && i < name->cRDN; i++)
2405         for (j = 0; j < name->rgRDN[i].cRDNAttr; j++)
2406             if (!strcmp(szOID_DOMAIN_COMPONENT,
2407              name->rgRDN[i].rgRDNAttr[j].pszObjId))
2408             {
2409                 PCERT_RDN_ATTR attr;
2410
2411                 attr = &name->rgRDN[i].rgRDNAttr[j];
2412                 /* Compare with memicmpW rather than strcmpiW in order to avoid
2413                  * a match with a string with an embedded NULL.  The component
2414                  * must match one domain component attribute's entire string
2415                  * value with a case-insensitive match.
2416                  */
2417                 matches = !memicmpW(component, (LPWSTR)attr->Value.pbData,
2418                  attr->Value.cbData / sizeof(WCHAR));
2419             }
2420     return matches;
2421 }
2422
2423 static BOOL match_dns_to_subject_dn(PCCERT_CONTEXT cert, LPCWSTR server_name)
2424 {
2425     BOOL matches = FALSE;
2426     CERT_NAME_INFO *name;
2427     DWORD size;
2428
2429     TRACE_(chain)("%s\n", debugstr_w(server_name));
2430     if (CryptDecodeObjectEx(X509_ASN_ENCODING, X509_UNICODE_NAME,
2431      cert->pCertInfo->Subject.pbData, cert->pCertInfo->Subject.cbData,
2432      CRYPT_DECODE_ALLOC_FLAG | CRYPT_DECODE_NOCOPY_FLAG, NULL,
2433      &name, &size))
2434     {
2435         /* If the subject distinguished name contains any name components,
2436          * make sure all of them are present.
2437          */
2438         if (CertFindRDNAttr(szOID_DOMAIN_COMPONENT, name))
2439         {
2440             LPCWSTR ptr = server_name;
2441
2442             matches = TRUE;
2443             do {
2444                 LPCWSTR dot = strchrW(ptr, '.'), end;
2445                 /* 254 is the maximum DNS label length, see RFC 1035 */
2446                 WCHAR component[255];
2447                 DWORD len;
2448
2449                 end = dot ? dot : ptr + strlenW(ptr);
2450                 len = end - ptr;
2451                 if (len >= sizeof(component) / sizeof(component[0]))
2452                 {
2453                     WARN_(chain)("domain component %s too long\n",
2454                      debugstr_wn(ptr, len));
2455                     matches = FALSE;
2456                 }
2457                 else
2458                 {
2459                     memcpy(component, ptr, len * sizeof(WCHAR));
2460                     component[len] = 0;
2461                     matches = find_matching_domain_component(name, component);
2462                 }
2463                 ptr = dot ? dot + 1 : end;
2464             } while (matches && ptr && *ptr);
2465         }
2466         else
2467         {
2468             PCERT_RDN_ATTR attr;
2469
2470             /* If the certificate isn't using a DN attribute in the name, make
2471              * make sure the common name matches.  Again, use memicmpW rather
2472              * than strcmpiW in order to avoid being fooled by an embedded NULL.
2473              */
2474             if ((attr = CertFindRDNAttr(szOID_COMMON_NAME, name)))
2475             {
2476                 TRACE_(chain)("CN = %s\n", debugstr_w(
2477                  (LPWSTR)attr->Value.pbData));
2478                 matches = !memicmpW(server_name, (LPWSTR)attr->Value.pbData,
2479                  attr->Value.cbData / sizeof(WCHAR));
2480             }
2481         }
2482         LocalFree(name);
2483     }
2484     return matches;
2485 }
2486
2487 static BOOL WINAPI verify_ssl_policy(LPCSTR szPolicyOID,
2488  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
2489  PCERT_CHAIN_POLICY_STATUS pPolicyStatus)
2490 {
2491     pPolicyStatus->lChainIndex = pPolicyStatus->lElementIndex = -1;
2492     if (pChainContext->TrustStatus.dwErrorStatus &
2493      CERT_TRUST_IS_NOT_SIGNATURE_VALID)
2494     {
2495         pPolicyStatus->dwError = TRUST_E_CERT_SIGNATURE;
2496         find_element_with_error(pChainContext,
2497          CERT_TRUST_IS_NOT_SIGNATURE_VALID, &pPolicyStatus->lChainIndex,
2498          &pPolicyStatus->lElementIndex);
2499     }
2500     else if (pChainContext->TrustStatus.dwErrorStatus &
2501      CERT_TRUST_IS_UNTRUSTED_ROOT)
2502     {
2503         pPolicyStatus->dwError = CERT_E_UNTRUSTEDROOT;
2504         find_element_with_error(pChainContext,
2505          CERT_TRUST_IS_UNTRUSTED_ROOT, &pPolicyStatus->lChainIndex,
2506          &pPolicyStatus->lElementIndex);
2507     }
2508     else if (pChainContext->TrustStatus.dwErrorStatus & CERT_TRUST_IS_CYCLIC)
2509     {
2510         pPolicyStatus->dwError = CERT_E_UNTRUSTEDROOT;
2511         find_element_with_error(pChainContext,
2512          CERT_TRUST_IS_CYCLIC, &pPolicyStatus->lChainIndex,
2513          &pPolicyStatus->lElementIndex);
2514         /* For a cyclic chain, which element is a cycle isn't meaningful */
2515         pPolicyStatus->lElementIndex = -1;
2516     }
2517     else if (pChainContext->TrustStatus.dwErrorStatus &
2518      CERT_TRUST_IS_NOT_TIME_VALID)
2519     {
2520         pPolicyStatus->dwError = CERT_E_EXPIRED;
2521         find_element_with_error(pChainContext,
2522          CERT_TRUST_IS_NOT_TIME_VALID, &pPolicyStatus->lChainIndex,
2523          &pPolicyStatus->lElementIndex);
2524     }
2525     else
2526         pPolicyStatus->dwError = NO_ERROR;
2527     /* We only need bother checking whether the name in the end certificate
2528      * matches if the chain is otherwise okay.
2529      */
2530     if (!pPolicyStatus->dwError && pPolicyPara &&
2531      pPolicyPara->cbSize >= sizeof(CERT_CHAIN_POLICY_PARA))
2532     {
2533         HTTPSPolicyCallbackData *sslPara = pPolicyPara->pvExtraPolicyPara;
2534
2535         if (sslPara && sslPara->u.cbSize >= sizeof(HTTPSPolicyCallbackData))
2536         {
2537             if (sslPara->dwAuthType == AUTHTYPE_SERVER &&
2538              sslPara->pwszServerName)
2539             {
2540                 PCCERT_CONTEXT cert;
2541                 PCERT_EXTENSION altNameExt;
2542                 BOOL matches;
2543
2544                 cert = pChainContext->rgpChain[0]->rgpElement[0]->pCertContext;
2545                 altNameExt = get_subject_alt_name_ext(cert->pCertInfo);
2546                 /* If the alternate name extension exists, the name it contains
2547                  * is bound to the certificate, so make sure the name matches
2548                  * it.  Otherwise, look for the server name in the subject
2549                  * distinguished name.  RFC5280, section 4.2.1.6:
2550                  * "Whenever such identities are to be bound into a
2551                  *  certificate, the subject alternative name (or issuer
2552                  *  alternative name) extension MUST be used; however, a DNS
2553                  *  name MAY also be represented in the subject field using the
2554                  *  domainComponent attribute."
2555                  */
2556                 if (altNameExt)
2557                     matches = match_dns_to_subject_alt_name(altNameExt,
2558                      sslPara->pwszServerName);
2559                 else
2560                     matches = match_dns_to_subject_dn(cert,
2561                      sslPara->pwszServerName);
2562                 if (!matches)
2563                 {
2564                     pPolicyStatus->dwError = CERT_E_CN_NO_MATCH;
2565                     pPolicyStatus->lChainIndex = 0;
2566                     pPolicyStatus->lElementIndex = 0;
2567                 }
2568             }
2569         }
2570     }
2571     return TRUE;
2572 }
2573
2574 static BYTE msPubKey1[] = {
2575 0x30,0x82,0x01,0x0a,0x02,0x82,0x01,0x01,0x00,0xdf,0x08,0xba,0xe3,0x3f,0x6e,
2576 0x64,0x9b,0xf5,0x89,0xaf,0x28,0x96,0x4a,0x07,0x8f,0x1b,0x2e,0x8b,0x3e,0x1d,
2577 0xfc,0xb8,0x80,0x69,0xa3,0xa1,0xce,0xdb,0xdf,0xb0,0x8e,0x6c,0x89,0x76,0x29,
2578 0x4f,0xca,0x60,0x35,0x39,0xad,0x72,0x32,0xe0,0x0b,0xae,0x29,0x3d,0x4c,0x16,
2579 0xd9,0x4b,0x3c,0x9d,0xda,0xc5,0xd3,0xd1,0x09,0xc9,0x2c,0x6f,0xa6,0xc2,0x60,
2580 0x53,0x45,0xdd,0x4b,0xd1,0x55,0xcd,0x03,0x1c,0xd2,0x59,0x56,0x24,0xf3,0xe5,
2581 0x78,0xd8,0x07,0xcc,0xd8,0xb3,0x1f,0x90,0x3f,0xc0,0x1a,0x71,0x50,0x1d,0x2d,
2582 0xa7,0x12,0x08,0x6d,0x7c,0xb0,0x86,0x6c,0xc7,0xba,0x85,0x32,0x07,0xe1,0x61,
2583 0x6f,0xaf,0x03,0xc5,0x6d,0xe5,0xd6,0xa1,0x8f,0x36,0xf6,0xc1,0x0b,0xd1,0x3e,
2584 0x69,0x97,0x48,0x72,0xc9,0x7f,0xa4,0xc8,0xc2,0x4a,0x4c,0x7e,0xa1,0xd1,0x94,
2585 0xa6,0xd7,0xdc,0xeb,0x05,0x46,0x2e,0xb8,0x18,0xb4,0x57,0x1d,0x86,0x49,0xdb,
2586 0x69,0x4a,0x2c,0x21,0xf5,0x5e,0x0f,0x54,0x2d,0x5a,0x43,0xa9,0x7a,0x7e,0x6a,
2587 0x8e,0x50,0x4d,0x25,0x57,0xa1,0xbf,0x1b,0x15,0x05,0x43,0x7b,0x2c,0x05,0x8d,
2588 0xbd,0x3d,0x03,0x8c,0x93,0x22,0x7d,0x63,0xea,0x0a,0x57,0x05,0x06,0x0a,0xdb,
2589 0x61,0x98,0x65,0x2d,0x47,0x49,0xa8,0xe7,0xe6,0x56,0x75,0x5c,0xb8,0x64,0x08,
2590 0x63,0xa9,0x30,0x40,0x66,0xb2,0xf9,0xb6,0xe3,0x34,0xe8,0x67,0x30,0xe1,0x43,
2591 0x0b,0x87,0xff,0xc9,0xbe,0x72,0x10,0x5e,0x23,0xf0,0x9b,0xa7,0x48,0x65,0xbf,
2592 0x09,0x88,0x7b,0xcd,0x72,0xbc,0x2e,0x79,0x9b,0x7b,0x02,0x03,0x01,0x00,0x01 };
2593 static BYTE msPubKey2[] = {
2594 0x30,0x82,0x01,0x0a,0x02,0x82,0x01,0x01,0x00,0xa9,0x02,0xbd,0xc1,0x70,0xe6,
2595 0x3b,0xf2,0x4e,0x1b,0x28,0x9f,0x97,0x78,0x5e,0x30,0xea,0xa2,0xa9,0x8d,0x25,
2596 0x5f,0xf8,0xfe,0x95,0x4c,0xa3,0xb7,0xfe,0x9d,0xa2,0x20,0x3e,0x7c,0x51,0xa2,
2597 0x9b,0xa2,0x8f,0x60,0x32,0x6b,0xd1,0x42,0x64,0x79,0xee,0xac,0x76,0xc9,0x54,
2598 0xda,0xf2,0xeb,0x9c,0x86,0x1c,0x8f,0x9f,0x84,0x66,0xb3,0xc5,0x6b,0x7a,0x62,
2599 0x23,0xd6,0x1d,0x3c,0xde,0x0f,0x01,0x92,0xe8,0x96,0xc4,0xbf,0x2d,0x66,0x9a,
2600 0x9a,0x68,0x26,0x99,0xd0,0x3a,0x2c,0xbf,0x0c,0xb5,0x58,0x26,0xc1,0x46,0xe7,
2601 0x0a,0x3e,0x38,0x96,0x2c,0xa9,0x28,0x39,0xa8,0xec,0x49,0x83,0x42,0xe3,0x84,
2602 0x0f,0xbb,0x9a,0x6c,0x55,0x61,0xac,0x82,0x7c,0xa1,0x60,0x2d,0x77,0x4c,0xe9,
2603 0x99,0xb4,0x64,0x3b,0x9a,0x50,0x1c,0x31,0x08,0x24,0x14,0x9f,0xa9,0xe7,0x91,
2604 0x2b,0x18,0xe6,0x3d,0x98,0x63,0x14,0x60,0x58,0x05,0x65,0x9f,0x1d,0x37,0x52,
2605 0x87,0xf7,0xa7,0xef,0x94,0x02,0xc6,0x1b,0xd3,0xbf,0x55,0x45,0xb3,0x89,0x80,
2606 0xbf,0x3a,0xec,0x54,0x94,0x4e,0xae,0xfd,0xa7,0x7a,0x6d,0x74,0x4e,0xaf,0x18,
2607 0xcc,0x96,0x09,0x28,0x21,0x00,0x57,0x90,0x60,0x69,0x37,0xbb,0x4b,0x12,0x07,
2608 0x3c,0x56,0xff,0x5b,0xfb,0xa4,0x66,0x0a,0x08,0xa6,0xd2,0x81,0x56,0x57,0xef,
2609 0xb6,0x3b,0x5e,0x16,0x81,0x77,0x04,0xda,0xf6,0xbe,0xae,0x80,0x95,0xfe,0xb0,
2610 0xcd,0x7f,0xd6,0xa7,0x1a,0x72,0x5c,0x3c,0xca,0xbc,0xf0,0x08,0xa3,0x22,0x30,
2611 0xb3,0x06,0x85,0xc9,0xb3,0x20,0x77,0x13,0x85,0xdf,0x02,0x03,0x01,0x00,0x01 };
2612 static BYTE msPubKey3[] = {
2613 0x30,0x82,0x02,0x0a,0x02,0x82,0x02,0x01,0x00,0xf3,0x5d,0xfa,0x80,0x67,0xd4,
2614 0x5a,0xa7,0xa9,0x0c,0x2c,0x90,0x20,0xd0,0x35,0x08,0x3c,0x75,0x84,0xcd,0xb7,
2615 0x07,0x89,0x9c,0x89,0xda,0xde,0xce,0xc3,0x60,0xfa,0x91,0x68,0x5a,0x9e,0x94,
2616 0x71,0x29,0x18,0x76,0x7c,0xc2,0xe0,0xc8,0x25,0x76,0x94,0x0e,0x58,0xfa,0x04,
2617 0x34,0x36,0xe6,0xdf,0xaf,0xf7,0x80,0xba,0xe9,0x58,0x0b,0x2b,0x93,0xe5,0x9d,
2618 0x05,0xe3,0x77,0x22,0x91,0xf7,0x34,0x64,0x3c,0x22,0x91,0x1d,0x5e,0xe1,0x09,
2619 0x90,0xbc,0x14,0xfe,0xfc,0x75,0x58,0x19,0xe1,0x79,0xb7,0x07,0x92,0xa3,0xae,
2620 0x88,0x59,0x08,0xd8,0x9f,0x07,0xca,0x03,0x58,0xfc,0x68,0x29,0x6d,0x32,0xd7,
2621 0xd2,0xa8,0xcb,0x4b,0xfc,0xe1,0x0b,0x48,0x32,0x4f,0xe6,0xeb,0xb8,0xad,0x4f,
2622 0xe4,0x5c,0x6f,0x13,0x94,0x99,0xdb,0x95,0xd5,0x75,0xdb,0xa8,0x1a,0xb7,0x94,
2623 0x91,0xb4,0x77,0x5b,0xf5,0x48,0x0c,0x8f,0x6a,0x79,0x7d,0x14,0x70,0x04,0x7d,
2624 0x6d,0xaf,0x90,0xf5,0xda,0x70,0xd8,0x47,0xb7,0xbf,0x9b,0x2f,0x6c,0xe7,0x05,
2625 0xb7,0xe1,0x11,0x60,0xac,0x79,0x91,0x14,0x7c,0xc5,0xd6,0xa6,0xe4,0xe1,0x7e,
2626 0xd5,0xc3,0x7e,0xe5,0x92,0xd2,0x3c,0x00,0xb5,0x36,0x82,0xde,0x79,0xe1,0x6d,
2627 0xf3,0xb5,0x6e,0xf8,0x9f,0x33,0xc9,0xcb,0x52,0x7d,0x73,0x98,0x36,0xdb,0x8b,
2628 0xa1,0x6b,0xa2,0x95,0x97,0x9b,0xa3,0xde,0xc2,0x4d,0x26,0xff,0x06,0x96,0x67,
2629 0x25,0x06,0xc8,0xe7,0xac,0xe4,0xee,0x12,0x33,0x95,0x31,0x99,0xc8,0x35,0x08,
2630 0x4e,0x34,0xca,0x79,0x53,0xd5,0xb5,0xbe,0x63,0x32,0x59,0x40,0x36,0xc0,0xa5,
2631 0x4e,0x04,0x4d,0x3d,0xdb,0x5b,0x07,0x33,0xe4,0x58,0xbf,0xef,0x3f,0x53,0x64,
2632 0xd8,0x42,0x59,0x35,0x57,0xfd,0x0f,0x45,0x7c,0x24,0x04,0x4d,0x9e,0xd6,0x38,
2633 0x74,0x11,0x97,0x22,0x90,0xce,0x68,0x44,0x74,0x92,0x6f,0xd5,0x4b,0x6f,0xb0,
2634 0x86,0xe3,0xc7,0x36,0x42,0xa0,0xd0,0xfc,0xc1,0xc0,0x5a,0xf9,0xa3,0x61,0xb9,
2635 0x30,0x47,0x71,0x96,0x0a,0x16,0xb0,0x91,0xc0,0x42,0x95,0xef,0x10,0x7f,0x28,
2636 0x6a,0xe3,0x2a,0x1f,0xb1,0xe4,0xcd,0x03,0x3f,0x77,0x71,0x04,0xc7,0x20,0xfc,
2637 0x49,0x0f,0x1d,0x45,0x88,0xa4,0xd7,0xcb,0x7e,0x88,0xad,0x8e,0x2d,0xec,0x45,
2638 0xdb,0xc4,0x51,0x04,0xc9,0x2a,0xfc,0xec,0x86,0x9e,0x9a,0x11,0x97,0x5b,0xde,
2639 0xce,0x53,0x88,0xe6,0xe2,0xb7,0xfd,0xac,0x95,0xc2,0x28,0x40,0xdb,0xef,0x04,
2640 0x90,0xdf,0x81,0x33,0x39,0xd9,0xb2,0x45,0xa5,0x23,0x87,0x06,0xa5,0x55,0x89,
2641 0x31,0xbb,0x06,0x2d,0x60,0x0e,0x41,0x18,0x7d,0x1f,0x2e,0xb5,0x97,0xcb,0x11,
2642 0xeb,0x15,0xd5,0x24,0xa5,0x94,0xef,0x15,0x14,0x89,0xfd,0x4b,0x73,0xfa,0x32,
2643 0x5b,0xfc,0xd1,0x33,0x00,0xf9,0x59,0x62,0x70,0x07,0x32,0xea,0x2e,0xab,0x40,
2644 0x2d,0x7b,0xca,0xdd,0x21,0x67,0x1b,0x30,0x99,0x8f,0x16,0xaa,0x23,0xa8,0x41,
2645 0xd1,0xb0,0x6e,0x11,0x9b,0x36,0xc4,0xde,0x40,0x74,0x9c,0xe1,0x58,0x65,0xc1,
2646 0x60,0x1e,0x7a,0x5b,0x38,0xc8,0x8f,0xbb,0x04,0x26,0x7c,0xd4,0x16,0x40,0xe5,
2647 0xb6,0x6b,0x6c,0xaa,0x86,0xfd,0x00,0xbf,0xce,0xc1,0x35,0x02,0x03,0x01,0x00,
2648 0x01 };
2649
2650 static BOOL WINAPI verify_ms_root_policy(LPCSTR szPolicyOID,
2651  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
2652  PCERT_CHAIN_POLICY_STATUS pPolicyStatus)
2653 {
2654     BOOL ret = verify_base_policy(szPolicyOID, pChainContext, pPolicyPara,
2655      pPolicyStatus);
2656
2657     if (ret && !pPolicyStatus->dwError)
2658     {
2659         CERT_PUBLIC_KEY_INFO msPubKey = { { 0 } };
2660         BOOL isMSRoot = FALSE;
2661         DWORD i;
2662         CRYPT_DATA_BLOB keyBlobs[] = {
2663          { sizeof(msPubKey1), msPubKey1 },
2664          { sizeof(msPubKey2), msPubKey2 },
2665          { sizeof(msPubKey3), msPubKey3 },
2666         };
2667         PCERT_SIMPLE_CHAIN rootChain =
2668          pChainContext->rgpChain[pChainContext->cChain -1 ];
2669         PCCERT_CONTEXT root =
2670          rootChain->rgpElement[rootChain->cElement - 1]->pCertContext;
2671
2672         for (i = 0; !isMSRoot && i < sizeof(keyBlobs) / sizeof(keyBlobs[0]);
2673          i++)
2674         {
2675             msPubKey.PublicKey.cbData = keyBlobs[i].cbData;
2676             msPubKey.PublicKey.pbData = keyBlobs[i].pbData;
2677             if (CertComparePublicKeyInfo(
2678              X509_ASN_ENCODING | PKCS_7_ASN_ENCODING,
2679              &root->pCertInfo->SubjectPublicKeyInfo, &msPubKey))
2680                 isMSRoot = TRUE;
2681         }
2682         if (isMSRoot)
2683             pPolicyStatus->lChainIndex = pPolicyStatus->lElementIndex = 0;
2684     }
2685     return ret;
2686 }
2687
2688 typedef BOOL (WINAPI *CertVerifyCertificateChainPolicyFunc)(LPCSTR szPolicyOID,
2689  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
2690  PCERT_CHAIN_POLICY_STATUS pPolicyStatus);
2691
2692 BOOL WINAPI CertVerifyCertificateChainPolicy(LPCSTR szPolicyOID,
2693  PCCERT_CHAIN_CONTEXT pChainContext, PCERT_CHAIN_POLICY_PARA pPolicyPara,
2694  PCERT_CHAIN_POLICY_STATUS pPolicyStatus)
2695 {
2696     static HCRYPTOIDFUNCSET set = NULL;
2697     BOOL ret = FALSE;
2698     CertVerifyCertificateChainPolicyFunc verifyPolicy = NULL;
2699     HCRYPTOIDFUNCADDR hFunc = NULL;
2700
2701     TRACE("(%s, %p, %p, %p)\n", debugstr_a(szPolicyOID), pChainContext,
2702      pPolicyPara, pPolicyStatus);
2703
2704     if (!HIWORD(szPolicyOID))
2705     {
2706         switch (LOWORD(szPolicyOID))
2707         {
2708         case LOWORD(CERT_CHAIN_POLICY_BASE):
2709             verifyPolicy = verify_base_policy;
2710             break;
2711         case LOWORD(CERT_CHAIN_POLICY_AUTHENTICODE):
2712             verifyPolicy = verify_authenticode_policy;
2713             break;
2714         case LOWORD(CERT_CHAIN_POLICY_SSL):
2715             verifyPolicy = verify_ssl_policy;
2716             break;
2717         case LOWORD(CERT_CHAIN_POLICY_BASIC_CONSTRAINTS):
2718             verifyPolicy = verify_basic_constraints_policy;
2719             break;
2720         case LOWORD(CERT_CHAIN_POLICY_MICROSOFT_ROOT):
2721             verifyPolicy = verify_ms_root_policy;
2722             break;
2723         default:
2724             FIXME("unimplemented for %d\n", LOWORD(szPolicyOID));
2725         }
2726     }
2727     if (!verifyPolicy)
2728     {
2729         if (!set)
2730             set = CryptInitOIDFunctionSet(
2731              CRYPT_OID_VERIFY_CERTIFICATE_CHAIN_POLICY_FUNC, 0);
2732         CryptGetOIDFunctionAddress(set, X509_ASN_ENCODING, szPolicyOID, 0,
2733          (void **)&verifyPolicy, &hFunc);
2734     }
2735     if (verifyPolicy)
2736         ret = verifyPolicy(szPolicyOID, pChainContext, pPolicyPara,
2737          pPolicyStatus);
2738     if (hFunc)
2739         CryptFreeOIDFunctionAddress(hFunc, 0);
2740     TRACE("returning %d (%08x)\n", ret, pPolicyStatus->dwError);
2741     return ret;
2742 }